Climate change threatens the Sundarbans

Md. Tareq Mahmud, The New Nation 1 Jun 08;

The Sundarbans mangrove forests, the largest of such forests in the world (over 10,000 km2 of land and water, more than half situated in India, the rest in Bangladesh), lie within the delta of the Ganges, Brahmaputra and Meghna rivers on the Bay of Bengal. The site is intersected by a complex network of tidal waterways, mudflats, and small islands of mangrove forests.

Mangroves are made up of salt-adapted evergreen trees. They are restricted to the inter-tidal zone along the vast coastlines of tropical countries and extend landward along tidal rivers.

Mangroves act as natural buffers against tropical cyclones and also as filtration systems for estuarine and fresh water. They also serve as nurseries for many marine invertebrate species and fish.

The Sundarbans mangrove forests are wellknown for their biodiversity, including 260 bird species, Indian otters, spotted deer, wild boar, fiddler crabs, mud crabs, three marine lizard species, and five marine turtle species. But they also host threatened species such as the estuarine crocodile, Indian python and the most iconic Bengal tiger.

For these reasons, the Sundarbans National Park, India, and the Bangladesh part of the Sundarbans were inscribed on the World Heritage List in 1987 and 1997, respectively.

According to the IPCC, sea-level rise is the greatest threat and challenge for sustainable adaptation within south and southeast Asia.

The consequences in terms of flooding of lowlying deltas, retreat of shorelines, salinitization and acidification of soils, and changes in the water table raise serious concerns for the wellbeing of the local population.

In addition to global sea-level rise (or eustatic sea-level rise, i.e. the change in global average sea level brought about by an alteration of the volume of the world ocean), there is a continuous natural subsidence in the Sundarbans, which causes a sea-level rise of about 2.2 mm per year. The resulting net sea-level rise rate is 3.1 mm per year at Sagar.

Additional sources of stress, not related to climate change, include the diversion of upstream freshwater inflow of the Ganges by the Farraka Barrage in India since 1974 to alleviate the rapid siltation in the Port of Calcutta. This barrage diversion induced a decrease of 40% of the dry season flow.

The joint action of sea-level rise, increased evapotranspiration, and lower freshwater flow in winter will also result in increased salinity in the area threatening the conservation of the Sundarbans mangroves.

In the Sundarbans, as in many protected areas worldwide, conservation is threatened by several external factors and, again, climate change should be viewed as one source of stress among others. Altogether these factors could lead, in the case of a 45 cm rise in global sea level, to the destruction of 75% of the Sundarbans mangroves.

Further destruction of the Sundarbans mangroves would diminish their critical role as natural buffers against tropical cyclones. The Bay of Bengal is heavily affected by tropical storms: about 10% of the world's tropical cyclones occur in this area and 17% of these sweep the land in Bangladesh.

No matter whether the frequency or intensity of cyclones change in the future due to climatic disturbances, exposure of the region to the devastating effects of storms will increase if the mangroves cannot be conserved successfully.

Sea-level rise is typically a process that cannot be entirely prevented through site level strategies.

However, the following measures could help in increasing the adaptive capacity of the Sundarbans mangroves against the adverse effects of sea-level rise:

· conservation of remaining mangrove forests in protected areas;

· restoration or rehabilitation of mangrove forests through re-planting selected mangrove tree species, for example along freshwater canals of reclaimed land (successfully practiced on Sagar Island).

Such measures make sense both ecologically and economically. A project of the United Nations Development Programme (UNDP) has evaluated the cost of building 2,200 km of protective storm and flood embankments that would supposedly provide the same level of protection as the Sundarbans mangroves. The capital investment was estimated at about US$294 million with a yearly maintenance budget of US$6million49 - much more than the amount currently spent on the conservation of the mangrove forests in the area.


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Best of our wild blogs: 1 Jun 08


Draft Master Plan 2008 and our shores
why should I care and do they know our shores exist? With separate entries on the impact on our Southern shores; Ubin, Chek Jawa is the reclamation still on? and Labrador on the wildfilms blog

M.I.A. Trail recap
an International Museum Day activity) on the Toddycats! blog

Spidery observations
on the budak blog

Little marine critters
under 1cm, the water teems with life! on the nature scouter blog

Javan myna visit
and more about this engaging 'pest' on the wonderful creations blog

Outreach updates
reports on secret shores talk and national youth environment forum on the lazy lizard blog


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Johor Baru hit by worst flood in 30 years

ROADS turn into RIVERS
The New Paper 1 Jun 08;

BLAME it on the rain.

A heavy downpour on Thursday evening caused heavy flooding in Johor Baru.

In the city centre, the water level on Jalan Wong Ah Fook (above, one of the main roads downtown), rose to as high as 50cm within half an hour, reported The Star.

In other areas, the waters rose to as high as 3m, leading Malaysian newspapers to call this the most serious flood in almost 30years.

Compounding the problem was the fact that the floods took place during peak hour traffic.

Motorists were left stranded as the streets turned into rivers. Close to 100 cars in a hotel basement carpark were almost submerged.

Many Malaysians working in Singapore found themselves stuck when they returned toJohor. They had parked their motorcycles in the city before going across the Causeway, and found that their vehicles were now underwater.

They ended up standing around in the rain waiting for the waters to subside.

Motorists wern't the only victims. At least 60 shops were flooded after the downpour. These included bookshops, electronics stores and provision shops.

Shopkeepers told China Press that while they had experienced floods in the past, the waters did not usually rise high enough to get into their shops.

The extent of the flooding this time around had caught them completely by surprise.

Because everything happened so quickly, many shopowners did not have time to move their goods, which were soaked.

A photo studio owner said the water caused a short circuit in his shop, damaging almost all his equipment.

He estimated that it could cost him up to RM200,000 ($84,000) to replace everything.

To help deal with the jams caused by the floods, Johor police diverted traffic around the most flooded areas.

But this did not prevent many irate drivers from honking as traffic continued to crawl forward.

The waters started to recede at around 7.30pm, and normal traffic flow only resumed at around 8pm.

Flood detection system to be installed in JB
Gladys Tay, The Star 30 May 08;

JOHOR BARU: An early flood detection system will be installed at the Sungai Segget floodgate to prevent flooding in the city centre, said Johor Baru City Council (MBJB) mayor Datuk Naim Nasir.

He said the new system was fully automatic and the floodgate would open automatically when a flood was detected.

"It will be the same system that we set up at Sungai Air Molek," he said, adding that floods no longer occurred in the area after the system was installed.

He said a water pump would also be included to pump floodwaters into the sea in case of a flood.

Naim was speaking at the full council meeting about the measures to be taken to prevent another flood from recurring in the city centre.

A few main roads in the city centre, including Jalan Wong Ah Fook, Jalan Trus, Jalan Meldrum and Jalan Segget were flooded on Thursday evening after a heavy downpour.

Naim also said before the system was installed, closed-circuit televisions (CCTVs) would be put up at both floodgates in the city centre namely Sungai Segget and Sungai Chat to monitor the situation.

"The CCTVs will be connected to our monitoring room at Bangunan Tabung Haji," he said.

He added that the total cost for the new systems and the CCTVs were expected to be about RM500,000.

Naim explained that during the incident, the floodgate at Sungai Segget was closed due to high tide.

"The sea waters began to rise at 11.19am and the floodgate was closed at 3.30pm to prevent sea waters from entering the city," he said, adding that the highest tide was 2.8m.

He said the flood was not due to blocked drains as the drains were not clogged with rubbish.

"Our men had to spend 45 minutes to open the gate manually," he said, adding that the last time the area was flooded was in 2004.

Among the places affected were basement parking lots at the MBF Building, Merlin Tower, shops and commercial buildings located along the roads.

Hundreds of vehicles parked at the area were either trapped or submerged in the floodwaters.

Although it had been more than 24 hours since the floods receded, many cars were still trapped in murky floodwaters in several basement carparks in the city.

Many of the vehicles belonged to hotel guests and even those working in Singapore.

On Thursday, an hour-long downpour at about 5.30pm caused flash floods of about 0.5m and 1m in several parts of the city.

The floods also brought traffic to a standstill along many roads in the city.

Flood Warning System To Be Installed At Sungai Segget
Bernama 30 May 08;

JOHOR BAHARU, May 30 (Bernama) -- The Johor Baharu City Council (MBJB) will install an early warning system at the Sungai Segget floodgate to prevent flooding in the city.

Mayor Datuk Mohd Naim Nasir said the early warning system would automatically open or shut the floodgate once flooding was detected.

Tenders for the installation of the system which operated on the Supervisory Control and Data Acquisition (Scada) system costing about RM500,000 had been opened, he told reporters after chairing a MBJB full council meeting here Friday.

He said the installation of the early warning system at the Sungai Ayer Molek floodgate was proven successful in controlling flooding.

On the flash flood in Jalan Wong Ah Fook here yesterday, he said it was due to a heavy downpour and high tide.

Mohd Naim said although the floodgate at Sungai Segget was closed at 3.30pm to prevent high tide from entering the city, heavy downpour beginning at 5.30pm had prompted the MBJB to open the floodgate at 6.45pm to release the water.

He said about 20 shops and 100 vehicles in Jalan Meldrum and Jalan Trus were submerged in the flash flood.

The flash flood which was the worst experienced by the city in the last four years was discussed at the MBJB full council meeting, he added.

-- BERNAMA


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Ridge and famous: Southern Ridges trails

Visitors are flocking to the Southern Ridges, a series of hill trails linking Mount Faber, Telok Blangah Hill and Kent Ridge parks, to take in the beautiful scenery
Tay Suan Chiang, Straits Times 1 Jun 08;

Move over, Singapore Flyer. The latest view to a thrill in Singapore is the Southern Ridges, a 9km series of hill trails with West Coast Park and HarbourFront MRT station at either end.

The final pieces of this ridge-to-ridge ramble through Mount Faber, Telok Blangah Hill and Kent Ridge parks fell into place last month with the opening of two pedestrian bridges - the Alexandra Arch and the Henderson Waves - and an elevated 1.3km walkway called the Forest Walk.

The links are the completion of a two-year, $25.5-million project by the Urban Redevelopment Authority that is part of a wider scheme where one day nature lovers will be able to do a circuit of the whole island.

Since the opening of the new links three weekends ago, Singaporeans have been flocking to explore the delights of the Southern Ridges.

Couples getting married, joggers, retirees, families with kids and shutterbugs are among those LifeStyle spotted taking in the sights, where once just nearby residents ventured for a short, quiet stroll.

The most popular destination is the distinctive wave-shaped, steel-and-timber Henderson Waves, a pedestrian bridge spanning 274m across Henderson Road and which links Telok Blangah Hill Park to Mount Faber. At a height of 36m, it is Singapore's highest pedestrian bridge.

Polytechnic lecturer Low Hann Ming, 38, was there with his family of nine one Saturday morning.

'We live opposite and can see the bridge from our flat so we decided to check it out,' he says, adding that the bridge is beautiful and the views are amazing.

With the school holidays now on, housewife Tan Tiong Gek, 61, took her two grandsons to Henderson Waves.

'The kids love it here as they can run around and the view is fantastic,' says the Bukit Merah View resident. 'We've taken more than 20 photographs already.'

The bridge's wave-like design is by British architects IJP Corporation and Singapore's RSP Architects Planners and Engineers, which won the bid to design it in a competition.

The bridge has seven undulating, curved ribs that rise over and under the bridge deck. The ribs form alcoves, providing visitors with shelter and seats within.

'The ribs make a dramatic backdrop,' says wedding photographer Ng Lam, 42, who took newlyweds Stella Lim and Wilson Ooi there to take pictures.

'It's a new location for wedding photography, otherwise it will be the usual spots such as Sentosa or Botanic Gardens,' says Mr Ng.

Another popular spot among visitors is the newly opened HortPark which boasts themed gardens.

The Southern Ridges offer breathtaking views of the Telok Blangah area, and also provide an up-close-and-personal experience of nature as the trails cut through lush greenery.

Walk through the forested areas and you can hear cricket calls and birds chirping. Monkeys have also been spotted, especially at the new elevated walkway heading to Alexandra Arch, designed by local company Look Architects.

The 80m-long Arch goes across Alexandra Road to the meandering walkway that eventually leads to Telok Blangah Hill Park.

One fan of the ridges is housewife Mary Lim, 44. The Bukit Merah resident often goes there for her thrice-weekly walks.

'It has got a lot more crowded now, but it's good that more Singaporeans are discovering such beautiful spots,' she says.

Architecture buffs will enjoy visiting two historical buildings, including Alkaff Mansion at Telok Blangah Hill. The now-abandoned mansion was built in the 1920s by Yemeni businessman Syed Abdul Rahman Alkaff as a family retreat.

The other historical building is the Danish Seamen's Church, near Mount Faber Park, formerly a private residence. Built in 1909, the Victorian house has many fine details, such as a corner circular tower and unique star-shape holes in cornices.

The area is not just attracting nearby residents.

Last weekend, LifeStyle bumped into secretary Yvonne Soh, 34, who came all the way from Woodlands with a group of friends to check it out. The first-time visitors started their walk at Harbourfront and planned to walk to Kent Ridge Park. The trip takes 21/2 hours.

'It's an easy and relaxing walk and also something new to see for all of us,' she says.


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Sustaining the will to tackle global warming

Many seem oblivious to how their day-to-day actions contribute to the mountain of waste and drain on key resources
B Warren Fernandez, Straits Times 1 Jun 08;

I stood in line at the fancy bakery for what seemed like an age. The cashier appeared to be in no hurry. Dressed in a white apron and cap, she carefully put each bun bought by a customer into a little plastic bag, then proceeded to put all these into a bigger bag of bags.

Some people, I suppose, are impressed by such service. But I was tired and hungry. Growling stomachs turn minds angsty, and I began to mentally rail at the utter waste of precious resources, and how the bags would only end up creating more rubbish for landfills, not to mention the cost they added to the price of those little buns.

As I was leaving the building, I stopped by the loo. It was not my day. Workers were busy washing the place and had set up a mini barricade. Water was gushing all over. Someone had left the water running and it came streaming out of an unattended hosepipe.

Didn't these people grow up with those campaign ads from the 1970s - 'Don't be a water waster!' - ringing in their heads, I wondered.

The irony of it all was this: A few hours earlier, I had attended a high-level briefing on plans to hold two major summits on sustainable cities and water resources here in Singapore later this month.

What would the thousands of delegates heading here for the inaugural World Cities Summit and the International Water Week, make of these scenes of wanton waste?

Ministers, governors, officials and leaders of non-governmental organisations (NGOs) from around the world will attend the event, to be held at Suntec City from June 23 to 25, which is being billed as a Davos-style meeting with a green twist.

The focus of the sessions will be how cities around the world are grappling with the challenge of planning, building and maintaining systems which are economically and environmentally sound.

Pulling off these meetings will be a feat. After all, thousands of the world's political, business and community leaders travel to the little Swiss Alpine village of Davos, a three-hour road ride from Zurich, put up with the bitingly cold winters, traffic congestion and antiquated hotels in order to attend the renowned World Economic Forum meetings each year.

They go simply because everyone else who matters is, and the meetings are an efficient way to cram several days full of discussions in formal and informal settings alike.

Singapore, with its efficient infrastructure, compact city centre and many other attractions - it surely is no coincidence that the annual arts festival and shopping jamboree are being held at the same time - is ideally placed to host such an event.

And by zeroing in on the hot topic of global warming and sustainable development, the organisers appear to me to be on to a winner, provided they put on a show which wows the delegates.

The Republic has much to show those attending the event, given its commitment to striving to make this tiny island a sustainable city from the 1960s, long before such talk became fashionable.

Delegates will be able to see for themselves the progress made in securing Singapore's water independence through the use of an elaborate system of reservoirs, collection of run-off water, desalination and the making of Newater, that very Singaporean feat of turning resource adversity to advantage.

They might also take in the Pulau Semakau landfill, which foreign publications like the New Scientist have hailed as a model of how cities might manage their waste while protecting biodiversity and the environment.

Indeed, in order to extend the life of these landfills, efforts have been made to cut back on the waste generated here, such as through a voluntary agreement signed in June last year by businesses here to minimise waste in their packaging.

According to a report last year, the National Environment Agency estimated that the amount of solid waste disposed in Singapore jumped six times between 1970 and 2000, to 7,600 tonnes a day.

If this rate of increase were to continue, Singapore would need to build a new incineration plant every five to seven years and a new landfill the size of Sentosa every 25to 30 years.

Lamentably, however, many seem blissfully oblivious to how their day-to-day actions contribute to the growing mountain of waste and rundown of precious resources as my recent experience at the bakery and mall made plain.

Herein lies a crucial lesson to be learnt from Davos and other elite talkfests, where the great and the good - dubbed 'Davos man' by some - come together to ponder - some might say pontificate? - about the world's woes without quite connecting with the people whose lives and futures they are worrying about.

Similar meetings, such as those organised by the World Bank, the International Monetary Fund or the G8 group of industrialised nations, have been afflicted by a similar 'Davos distraction', namely, failing to engage the public, from NGOs to local communities, giving rise to a disconnect between those within the debating halls and the protesters outside.

This is why it would be a pity indeed if officials organising the twin summits on cities and water fail to use the events to reinforce public understanding and support for the need to keep Singapore's growth sustainable.

They will need to find creative ways to take the issue to the heartland and bring the debates and policy initiatives alive for the man in the street, so that people see how and why sustainable development matters to them, and what they might get out of changing habits and lifestyles.

Mere exhortation will not be enough. Instead, a mix of public education, social pressure as well as economic incentives will be needed if the effort is to make a difference.

This is critical, not least since some recent global surveys have pointed to a cooling of public concern about climate change, amid more immediate woes, such as rising fuel and food prices as well as job losses arising from an economic slowdown.

A report in the Financial Times last week noted: 'At a time of falling house prices and rising household costs, people are telling pollsters that they are no longer quite so interested in saving the planet. Ipos Mori has found that environmental concerns reached a pinnacle in January 2007, when 19 per cent of people, unprompted, named the environment as one of the biggest issues facing Britain today, compared to just a few per cent several years earlier.

'But by January 2008, the figure had fallen to 8 per cent, while the economy was rated a top concern by one in five. One very senior member of the shadow Cabinet put it more strongly: 'People hate this green stuff.''

A report in yesterday's International Herald Tribune also noted that research into new clean coal technologies, often touted as a critical part of the solution to the world's energy needs and emission worries, had also run into funding and political problems.

Yet, the imperative for action on climate change is as urgent as ever.

Indeed, Lord Nicholas Stern, the British economist whose stark analysis on the dangers of global warming sparked calls for political action around the world, told the FT that he would have written an even more hard-hitting report if he had access to the latest, more troubling research.

Efforts to tackle the problem would, therefore, have to be kept up.

'We will go through many economic cycles on the way to solving this problem. It is a long- term issue,' he said.

The upshot is this: Even as world leaders meet to brainstorm how to shape policy initiatives to tackle rising global temperatures and falling water supplies, they should not neglect to find ways to engage the public, shape consensus and incentivise changes in mindsets and behaviour.

Ultimately, progress can be made only if the political will to tackle climate change is, well, sustainable.


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Former Japanese minister urges international accord on food, energy security

Channel NewsAsia 1 Jun 08;

SINGAPORE: Former Japanese defence minister Yuriko Koike has called for an international accord on food and energy security ahead of the G8 summit in Japan as consumers around the world are battling to cope with record rice and fuel prices.

Ms Koike made these remarks on the sidelines of the Shangri-La Dialogue Asia Security Summit in Singapore on Saturday.

She highlighted that the controversy over biofuels, such as ethanol made from corn, needs to be regulated.

The Asia Security Summit, the seventh in the series, brings together defence, national security officials and regional analysts.

It is organised by the London-based International Institute for Strategic Studies (IISS), an independent think-tank.

Ms Koike said: "You know the crude oil, in New York, price hit almost US$140 a barrel. Well, it's now reducing a little bit, but still the tension is very high. So the price has skyrocketed in a year or so, mostly because of speculation.

"We should keep our life more low-carbon or maybe have a no-carbon society. We have to be prepared and this is one of the biggest agenda in the G8 summit meeting, which will be held in Hokkaido, Japan, this year.

"We have to have international regulations or international accord to prepare for this sustainable world. I hope that at the G8 summit meeting we will get some sort of conclusion or outcome to share the same view to prepare for the sustainable world."

Ms Koike, a member of the Japanese Parliament's Lower House and the ruling Liberal Democratic Party, is in Singapore under the Singapore International Foundation Temasek programme. - CNA/de


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Jellyfish patrols take the sting out of Ibiza

Jane Dunford, The Observer 1 Jun 08;

The beautiful beaches of Spain's Balearic islands have long been plagued by jellyfish, but starting today, the locals are fighting back.

For the first time, the authorities will use a fleet of fishing boats to patrol the waters, effectively creating a safety cordon around the shore. Using satellite imagery, the anti-jellyfish force will locate large shoals, then use specially designed nets to catch them.

Forty boats, including 16 in Ibiza, will be issued with the nets. As well as a daily fee, reportedly of €600 per boat, the fishermen will be paid for every kilo of jellyfish they catch. The scheme will last four months. The jellyfish cannot be caught when far out to sea, because they sink too far below the surface and other marine life would be snared in the nets. Instead, the boats must wait until the 'banks' of jellyfish are a few hundred metres from shore. Once caught, they can be recycled as protein-rich fertiliser.

The local authorities are at pains to stress that the initiative is not in response to a greater threat of jellyfish this summer, and that so far the satellites have spotted nothing out of the ordinary. However, overall, the hazard appears to be growing throughout the Mediterranean. Last June, lifeguards in one town in Ibiza, San Antonio, had to deal with 152 cases of jellyfish stings. Josep-Maria Gili, research professor at Barcelona's Institute of Marine Sciences, is predicting that this summer will see another serious invasion of Pelagia noctiluca, the 'mauve stinger' that commonly afflicts Mediterranean beaches.

'Conditions in recent years have been ideal - very mild and with little rain and with unusually warm sea temperatures,' he said. 'People have been really enjoying it, but these are perfect conditions for jellyfish.'

Over-fishing has led to the demise of the traditional predators, including swordfish and red tuna. The leatherback turtle, another predator, has been driven to the point of extinction. While painful, the sting of Pelagia noctiluca normally poses no serious health risks.


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Gujarat scientists spot rare, endangered sea cows off Andaman coast during survey

Bashir Pathan, Express India 1 Jun 08

Gandhinagar, May 31 Researchers at the Gandhinagar-based Gujarat Ecology and Environment Research (GEER) Foundation have succeeded in sighting the rare and endangered dugongs (sea cows) – off the coast of Andaman and Nicobar Islands during the on-going national-level survey of the animals.

A two-member team comprising GEER Foundation scientists Dr Bharat Jethwa and Parimal Solanki, who went to the islands last month, encountered the marine mammals while snorkelling off the waters of Neil Island along the South Andaman coast.

"It was a thrilling experience for me and my fellow researchers to catch the sight of dugongs and also snorkel along with one of them in the blue waters of the picturesque Neil Island," Solanki told this paper on Saturday.

Last April, the Union Environment and Forest Ministry had asked the GEER Foundation to conduct a national-level survey, following reports that the population of the legendary dugongs along the Indian coast was on the verge of extinction. The Union Ministry has now asked the Foundation to submit its report to it by March 2009.

"As part of the survey, teams of our researchers have started visiting the coastal states to identify the threat to the dugong population and also understand and assess the critical issues for the conservation of the marine mammals and their habitat," said GEER Foundation's Director C N Pandey.

The Centre – sponsored project would also provide a much-needed exposure to researchers and help them contribute a lot to marine biodiversity – related research works.

During the current survey, the research team conducted a field visit to as many as 60 coastal villages in the Gulf of Mannar and another 40 villages along the Palk Bay in Tamil Nadu to ascertain whether sea cows do exist off the coast of Tamil Nadu. The researchers, however, could not sight any dugongs off the Lakshdweep coast.

The survey team also extensively visited the Saurashtra coast. Although they failed to spot the marine mammals, local fishermen confirmed to the team members that dugongs have often been spotted in the area. "The fact that the dead body of a dugong was recovered near the Dwarka coast last December clearly suggests that sea cows do exist off the Saurashtra coast," said Jethwa.

The research team will now begin a survey in other maritime states like Goa, Andhra Pradesh, Karnataka and Maharashtra.

Dugongs are herbivorous marine mammals and protected under Schedule I of the Wildlife Protection Act, 1972. They are also listed on Appendix I of the Convention on International Trade in Endangered Species of Wild Fauna and Flora and globally classified as "vulnerable to extinction" due to an average population decline rate of nearly 20 per cent in the last 90 years. "Their habitat requirement and slow rate of reproduction render them vulnerable to anthropogenic activities and the marine mammals are threatened by hunting, net captures, pollution and haphazard coastal development," said a senior researcher.


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Galapagos eruption no threat to giant turtles

Alonso Soto, Reuters 31 May 08;

QUITO (Reuters) - A volcano in the Galapagos islands that spewed molten lava is not a threat to 100-year-old giant tortoises living around the crater, island officials said on Friday.

The 5,541-feet- (1,690-metre-) high Cerro Azul mountain started spewing lava on Thursday after 10 years of inactivity on the largest island of the Galapagos archipelago, a chain formed from volcanoes thrusting from the Pacific Ocean.

"There is no threat to the local human population ... nor for the tortoise population because lava rivers are flowing in the opposite direction," the Galapagos Park said in a statement after its rangers flew over the mountain to assess the eruption.

In the last eruption in 1998, rare tortoises were airlifted from around the crater on helicopters to escape the lava, but several massive turtles were burned.

"I could see the red glow from my house last night," said Jacqueline Brunf, a New York native who owns a tour operator business on another of the islands. "It was really strange we didn't feel anything or hear anything."

The Galapagos islands are part of Ecuador and lie 600 miles west of the South American mainland.

English naturalist Charles Darwin developed his evolution theory after studying their unique animal population.

The islands are scarcely populated, but the United Nations last year said the Galapagos' pristine environment was in danger due to booming tourism and immigration.

(Reporting by Alonso Soto; editing by Patricia Zengerle)


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Shark fin soup 'should be banned in Australia'

Josephine Asher, ninemsn 30 May 08;

A top Sydney chef says shark fin soup should be banned from Australian restaurants because the demand for the delicacy is driving sharks to extinction.

Dank Street Depot’s Jared Ingersoll said serving shark fin dishes in Australia is promoting an unsustainable industry.

"Stocks of shark and shark fin are depleting and unless we take a stand and say no to this product it's going to run out," he said.

Mr Ingersoll said as well as the restaurant ban, the importation of the shark fins from other countries should be stopped.

"Buying it in from other countries, we're actually not solving the problems because we're shifting the problem to someone else’s front door," he said.

Shark finning — the brutal but lucrative practice of cutting fins off live sharks and throwing them back into the ocean to slowly drown — is banned in Australia.

But Australia still imports 10,000kg of dried shark fins every year from countries that have not banned finning, including China and The Philippines, which equates to an estimated 26,000 sharks.

ninemsn has found that dried sharks fins are widely available in Sydney's Chinatown with price tags up to $1400 per kilogram and $158 a bowl of shark fin soup.

The dish is a symbol of wealth in Asian culture, but recently it has also appeared on western-style menus, including at Quay restaurant in Sydney.

Glenn Sant, from Wildlife Trade Monitoring Network TRAFFIC, said the global trade in shark fins was a major concern.

"Its not identified at all when it appears in a ship or through markets whether it’s from a sustainable source or a legal source," he said.

Mr Sant said Australia had come a long way to protecting sharks but still played a significant role in the shark fishing industry — catching up to 12,000 tonnes per year.

He said the government needed to do more to demonstrate that they are managing in a sustainable way.

Chef Neil Perry, who heads Rockpool restaurants in Sydney and Melbourne, will only only serve seafood that is harvested sustainably.

"We know where it comes from, we know the fishermen and we know the fishing methodology," Mr Perry said.

But he said the real issue was how the industry is managed.

"We should probably be able to have shark fin at some stage if the inhumanity of finning is stopped, the shark is being harvested from a sustainable biomass and all of the shark is being used."

"It’s not a matter of getting banners and marching outside Chinese restaurants in Chinatown — it’s really a matter of having a dialogue at [a global] government level."

Documentary film SharkWater, released in Australian cinemas this month, has ignited controversy over shark finning with it’s portrayal of cracking the black market fin trade in Costa Rica.

Director Rob Stewart, also a marine biologist, said shark populations have dropped 90 percent in the last 30 years because of the growing demand for shark fin soup in Asia.

"We're not living in a sustainable relationship with the world that allows us to survive on land and we need to turn that around really quickly," he told ninemsn.
Last month, the Minister for the Environment, Peter Garrett, placed an export ban on a fishery in northern Western Australia because of an alarming decline in one shark species.

"The rate of decline in the sandbar shark was considered so severe that shark fishing had to be stopped in the area," a WA Fisheries Department spokesman said.


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"La Nina" effect may be behind shark attacks

Mariano Castillo, Reuters 31 May 08;

ZIHUATANEJO, Mexico (Reuters) - Cooler than normal sea-surface temperatures due to the La Nina phenomenon may be partly responsible for a spate of fatal shark attacks off Mexico's Pacific coast, a U.S. shark expert said on Friday.

At least two people -- a surfer and a U.S. tourist -- have been killed by sharks in the last few weeks around the coastal town of Zihuatanejo in the state of Guerrero.

La Nina, which usually results in cooler than normal water in the Pacific, has moved the boundary between cold and warm water closer to the shore, and along with it, fish and their shark predators, George Burgess, director of the Florida Program for Shark Research told Reuters.

The last time Mexico's Pacific coast suffered a series of fatal shark attacks was in 1972-1973, when four people were killed.

"One of the factors we're investigating is if there are special oceanographic conditions that might have contributed to the attacks," said Burgess, who was invited by Guerrero state officials to investigate.

Burgess and a Mexican researcher have pored over medical and police records and interviewed eyewitnesses, but said more research was needed before a definite cause could be found.

Burgess suspects more than one killer shark was responsible for the attacks and they were probably bull sharks.

"Bull sharks are probably the species that we as humans need to fear the most because they live close to shore and inhabit the waters that we as humans most often visit," he said.

"The odds are very high that it is not a single shark," Burgess said, noting that the size of the bites were not the same. Burgess estimates that the attacking sharks were large, ranging from 8 to 10 feet.

At a meeting with state and local leaders on Friday, Burgess made recommendations including having trained lifeguards at every beach, posting warning signs about the sharks, and the need for more scientific research into sharks in the region.

"I don't think people should be afraid. I think people should have respect for sharks, just as one respects any wild animal," Burgess said.

(Editing by Chris Aspin and Anthony Boadle)


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Fed up with too much packaging? Just leave it on the counter

IoS takes direct action against Britain's mountain of unnecessary wrapping

Archie Bland, The Independent 1 Jun 08;

"I'm Not a Plastic Bag" hardly seems a slogan worth bothering with these days: reusable carriers now seem as ordinary a feature of a trip to the shops as a trolley with a wobbly wheel. The tipping point was arguably Plan A, not just any anti-plastic campaign, but a Marks & Spencer anti-plastic bag campaign: when the Grand Old Dame of the British high street starts charging 5p per unnecessary receptacle, people pay attention.

But a new study by the Local Government Association has cast doubt on those green credentials. The report, published last week, found that a typical shopping trip generated an average of 714g of packaging – and M&S was second from the bottom of the pile just ahead of Lidl, with 807g, and a lower percentage of it recyclable than any other retailer. Plastic bags seem rather beside the point.

Fortunately, The Independent on Sunday has its own Plan B: ever green, we resolved to try to reduce the environmental impact of our Saturday lunchtime shop, and see what would happen if we removed the cardboard sleeves and stay-fresh scrunchy wrappers at the till. All right, the detritus would still probably end up in a landfill somewhere, but at least our hands would be clean.

The results were predictably ugly, and weirdly illogical. I can see that slices of Edam probably need to be kept together, if there's really anyone who needs their cheese fix pre-sliced; but surely a bunch of bananas will maintain their integrity unaided? If squashes and asparagus are deemed tough enough to survive without a blast-proof casing, won't the skin on an avocado protect it from the elements? And I know the lamb with rosemary and crispy potato slices is sold "ready to roast", but is there really anyone out there with an oven and a mind to use it who doesn't also own a roasting tin?

Mel at the till doesn't have any answers to these obnoxious questions. But she agrees that "It is a lot of plastic", and, after a doubtful few moments watching me tip croissants from their redundant tray and into the morass of loose treats in our trusty Tesco Bag for Life, helpfully starts to deplasticise a similarly encumbered set of chocolate chunk cookies. The job done, poor Mel looks a bit nonplussed by the mound of rubbish obscuring her view of the customers, and after a brief struggle with a guilty conscience, I end up stuffing the plastic mountain into our bag as well.

The journey home is not without complications – to me, the ripe aroma of bruised fruit and buttery croissants is a heady reminder of childhood picnics past; to everyone else on the tube it is more immediately reminiscent of a dustbin. It also becomes clear that packing loose food requires a little more TLC than I, with my hyper-packaged habits, am normally wont to give. Still, by and large, the goodies make it home intact, and the associated pile of jetsam is so vast that it's hard not to want to do something about it. Say it with me: I am not an Individual Plastic Biscuit Tray!


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Giant artificial trees 'to clear excess CO2'

BBC News 31 May 08;

The scientist who coined the term "global warming" in the 1970s has proposed a radical solution to the problem of climate change.

Wallace Broecker advocated millions of "carbon scrubbers" - giant artificial trees to pull CO2 from the air.

Dr Broecker told the Hay literary festival in south-east Wales: "We've got an extremely serious problem.

He added: "It's a race against time and we are just sort of crawling along at a slow pace."

He said some 20 million of the scrubbing devices would be required to capture all the CO2 currently produced in the US.



But he told the festival: "Okay, you say that's enormous, but we make 55 million cars a year, so if we really wanted to we could. Over 30 or 40 years we could easily make that number."

After addressing the festival, Dr Broecker told the BBC News website that 60 million of the devices would be needed worldwide at an estimated cost of $600bn (£303bn) a year.

The towers would be about 50ft high and 8ft in diameter, and use a special type of plastic to absorb the CO2.

The gas would then be either liquefied under pressure and pumped underground or turned into a mineral.

Political will

Dr Broecker said the most likely location for the towers would be desert areas of the planet.

However, he admitted that such a project faced an uphill struggle.

"If I were a betting man I would bet against it because I don't know if we have the political will to do it," he said.

"But looking at countries like Germany and here in the UK the will is developing."

He said the challenge was to get rapidly developing countries such China, India and Brazil behind the idea.


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Pie in the sky: The world's first edible high-rise

The Independent 1 Jun 08;

The potential of city-based farming could be vastly expanded if we extend upwards as well as using ground-level plots.

Of course, one major problem with growing produce on our roofs is the quantities of soil needed, which would add unfeasible amounts of weight. However, hydroponic technology – using nutrient-enriched water instead of soil – could be the solution.

Toronto scientist Gordon Graff has created plans for a 58-floor concept building – the SkyFarm – which would grow crops in the heart of the city and could provide enough food for 35,000 people every day.

Crops would be irrigated by water recycled through the building's hydroponic system and, with no soil, many diseases are ruled out – meaning no need for chemical pesticides.

Rumours abound of a similar skyscraper farm being developed in Las Vegas. It is said that the 30-storey structure would be not just about agriculture, but would house pigs too – though some have suggested the vertical pork farm could be a hoax. Punchlines on a postcard, please.


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The urban farmer: One man's crusade to plough up the inner city

Kate Burt, The Independent 1 Jun 08;

Fritz Haeg isn't perhaps the obvious representative of a revolution in global farming. As an architecture and design academic and practitioner, the American has had his work exhibited at Tate Modern and the Whitney Museum of American Art, and has taught fine art at several US universities. Yet it is last year's community-collaborative project on an inner-city council estate in south London that best showcases his current passion: the urban farm.

Last April, in a discussion about the global food crisis, Gordon Brown announced: "We need to make great changes in the way we organise food production in the next few years."

High on the list of viable changes is the idea of inner-city agriculture. Which is the theory behind Haeg's concept, detailed in his new book Edible Estates: it proposes the replacement of the domestic front lawn in cities with "an edible landscape".

Last year, to illustrate this point, Haeg was commissioned by the Tate to create a permanent "edible estate" on a triangle of communal grass in front of a housing estate near Elephant and Castle, bordered on two sides by a main road along which London buses thunder every few minutes.

The aim was to engage and involve the local residents – and together they miraculously transformed a patch of grass previously favoured by dogs and drunks into a luscious agri-plot housing apple and plum trees, a "forest" of tomato plants, aubergines, squashes, Brussels sprouts, runner beans, sweet peas, a "salad wing", herbs, edible flowers and 6ft artichoke plants. It is also quite beautiful: "The design was inspired by the ornate, curvy raised flowerbeds you find in front of Buckingham Palace," explains Haeg. Interestingly, although this space is still accessible by passers-by – unlike the traditional allotment, which Haeg feels is outdated – there has been no theft or vandalism. The London project was mirrored in several locations around the US.

"All the projects I do are rooted in the way that an architect thinks and works," says Haeg. "How we live and the spaces we make for ourselves." And right now, he believes, we need to re-evaluate exactly that, and urgently so – particularly in our overcrowded cities.

As part of its "One Planet Living" initiative, the World Wildlife Fund calculated our average personal carbon footprint in Britain. Perplexingly, it found that food production and its transport accounts for our greatest use of carbon – 23 per cent per person – beating personal transport, home energy and even shared services (the running of schools, hospitals, banks and so on). These results, combined with food shortages and escalating costs – the price of apples and eggs has risen by 30 per cent in the past year – mean action must be taken, says Haeg. Ornamental urban space is a luxury we can no longer afford, he believes: we need to be growing food on our lawns, greens, driveways and even public parks.

Haeg is not the only one to think it is time for change. The global Consultative Group on International Agricultural Research (CGIAR) strategic alliance estimates that, by 2015, more than half the world's population will be living in urban areas, provoking one of the greatest challenges in the history of agriculture as we try to find a way to keep a lid on food miles and produce enough food for everyone. "Now, more than ever," urges Sustain, the alliance for better food and farming, "we need to grow more food closer to where people live." And in this climate, it seems that everyone from town planners to head teachers, TV chefs to agri-entrepreneurs are getting excited about farming food in the big smoke.

But is it realistic to turn over our spare urban soil to the cause – and is there really enough of it to do so? Erik Watson, an urban design director at the town-planning company Turley Associates, strongly believes that inner-city agriculture is the future. As such, he is already advising his clients on ways to incorporate farming into their developments and is particularly excited about the potential for transforming existing space enclosed in the traditionally British city structure, the "perimeter block" (a row of buildings constructed around an enclosed, private square – typically divided into private gardens). "Look at an aerial view of London and you'll see there's an enormous amount of private open space contained within these blocks. It is perfect for this urban agricultural revolution," he says.

Re-apportioning private space might not be as far-fetched as it sounds. Later this month Sustain is hosting a conference, called Growing Food for London, where ideas to be aired include the possibilities of using derelict council facilities, social housing land and unused private gardens for commercial agriculture, as well as the planting of fruit and nut trees in parks and along roads, creating community gardens in public parks and replacing ornamental plants with edible crops. It will also look at alternative food production such as mushroom growing, beekeeping and planting edibles in window boxes, as well as ideas for the little-explored area of rearing livestock in urban areas.

While beekeeping is on the rise in British cities – it is estimated that there are 5,000 beehives in London alone – other urban animal-based edibles are rare. Hunting might be the answer here – squirrel meat has already been seized upon as a sustainable, free-range delicacy in rural Cornwall – could it catch on in cities? Might pigeon pie become a Trafalgar Square speciality; has anyone thought of fox cutlets?

Perhaps more realistic is organised urban livestock rearing. "There are issues with planning – noise pollution and so on," says Zeenat Anjani from Sustain, "but you could definitely raise chickens and other small animals. We hope the Growing Food conference will open more people's minds to these sorts of ideas and get the right people in the same room to talk about what they can do."

Many are already talking about it. Inspired by the "victory gardens" of the First and Second World Wars, when civilians were urged to "dig for victory" to survive the food shortages, Jamie Oliver's newest venture is to inspire the residents of inner-city Rochdale to eat like our wartime forebears and grow their own, while Hugh Fearnley-Whittingstall's new River Cottage series challenges five Bristol familes to transform a derelict patch of land into a fruitful smallholding.

In Middlesborough, the Groundwork South Tees trust has begun an urban-farming education programme to teach people how to cultivate herbs, vegetables and fruit even if they do not have a garden, by providing containers for patios, balconies and windowsills. There are also sustainable-food grants available to those who want to educate others how to produce their own food in cities, and how to compost effectively to improve typically poor-quality urban soil. '

If it comes off, perhaps one of the most high-profile initiatives – still at bid stage – is the Feed the Olympics proposal. It is a radical blueprint from several green organisations outlining how 6,000 acres of land in London could be put to work to grow enough food to provide the 14m-odd meals that will be needed during the 60 days of the 2012 Games, instead of importing it. This would involve creating 2,012 new food-growing spaces across the capital, including community gardens, allotments and roof gardens.

Revolutionary? In this country, yes – but we're lagging behind countries such as China, Japan and Cuba, which already have farms integrated into the social, economic and physical structures of their cities; as early as a decade ago Beijing town planners had begun to incorporate agriculture into the urban landscape. The Chinese government also offers courses to aspiring urban farmers and plans to cultivate gardens on nearly 10,000,000sq ft of roof space over the next 10 years.

Similarly, Argentina's Programa de Agricultura Urbana (PAU) was set up to support city-based farmers in the aftermath of the country's financial collapse. And in Cuba, when the US-led trade embargo resulted in severe food shortages, the government responded by investing in urban farms, providing state-owned plots and teaching relevant skills in schools.

But will it work in Britain? Carole Wright, who manages the communal garden created by Haeg in south London, says it already is. "It cost less than £5,000 to create and it is capable of feeding three blocks of flats with 24 households each," she says. "We run family gardening sessions, Sunday sessions, after-school clubs and also container gardening, so residents can grow things on their balconies too. High- density housing is no barrier – you can grow things out of an old baked-bean can. The more people we can get, the more we can produce. It's not about the size of the land – it's about the maintenance." She has had no shortage of regular, enthusiastic volunteers – surprisingly most of whom are children.

Wright was delighted when one girl, a moody teenager who described herself as a "cybergoth", grew her own beetroot. "You'd never have known she was excited about it," says Wright, "but I spotted her one evening with her friends, holding the thing in her hands. 'What are you doing with that?' I asked. 'Well,' she said, 'I grew it – I wanted to show my mates.' She comes down every day now to water her sunflowers."

It's not just about financial and health benefits – Wright has also noticed social benefits. "People who have not spoken for five years are suddenly chatting again, discussing what they've grown. And it brings together people from different cultures too – they lean over the fence and reminisce about the vegetables they grew in their countries as children – okra, bananas, yams, sweet potatoes."

Wright describes one gardener, an elderly widow, who has planted an almond tree as a memorial to her late husband and says he would have loved to see how the space had been transformed. "One guy has even replaced the photo of his family on his mobile phone with a picture of the garden. It's given them so much pride."

The impact of the garden has been enormous, says Wright. People from further and further away are coming along to get involved, learn new skills and socialise. "They see it and it's like a lightbulb and they say, 'We want our own edible estate.' Well, it makes sense, doesn't it?"

The world's first edible high-rise

The potential of city-based farming could be vastly expanded if we extend upwards as well as using ground-level plots.

Of course, one major problem with growing produce on our roofs is the quantities of soil needed, which would add unfeasible amounts of weight. However, hydroponic technology – using nutrient-enriched water instead of soil – could be the solution.

Toronto scientist Gordon Graff has created plans for a 58-floor concept building – the SkyFarm – which would grow crops in the heart of the city and could provide enough food for 35,000 people every day. Crops would be irrigated by water recycled through the building's hydroponic system and, with no soil, many diseases are ruled out – meaning no need for chemical pesticides.

Rumours abound of a similar skyscraper farm being developed in Las Vegas. It is said that the 30-storey structure would be not just about agriculture, but would house pigs too – though some have suggested the vertical pork farm could be a hoax. Punchlines on a postcard, please. KB


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Animals fare better in zoos as experts learn more

Andrew Stern, Yahoo News 30 May 08;

Scientists are learning more about how zoo animals feel and how a toy or a little training can sometimes help cut the endless pacing and other repetitive behaviors that are often assumed to be signs of distress.

Some big cats want a high perch from which to view visitors, polar bears want to scratch for hidden caches of food, and male barn swallows could use a tail extension to appeal to potential mates, according to experts from zoos and universities meeting on Friday at Chicago's Brookfield Zoo.

Visitors who see a cheetah pacing or a polar bear swimming in circles might assume they are stressed by confinement. But they may simply be expending excess energy or soothing themselves, experts said interviews at the symposium.

"We humans swim laps, and people take comfort in walking in circles. As long is it not injuring the animals, and not causing them pain, it may not be a sign of poor welfare," said Nadja Wielebnowski of the Chicago Zoological Society.

Wielebnowski measures stress hormones in zoo animals and her work is helping guide efforts to reduce stress when animals are moved, come in close contact with humans or are exposed to noise.

"Some species do absolutely great in zoos -- they get great food, they get it every day, they have great veterinary care. For some species, the zoo trumps the wild," said David Shepherdson of the Oregon Zoo in Portland.

But some species, like elephants, large cats, and bears, often do not fare as well.

In a study of polar bears in U.S. zoos, Shepherdson found 50 of 54 bears displayed behavioral symptoms of stress, but they showed no elevated levels of corticosteroids, which are hormones that indicate stress, he said.

Shepherdson found about half the animals reduced their repetitive behavior when give some training or playthings that helped them mimic behavior in the wild.

For example, polar bears given a plastic barrel tended to crush it just as they would a seal den in the Arctic.

NOT BELONGING

Experts are also discussing whether certain species, like certain types of leopard, do not belong in zoos at all because they prefer to remain out of sight.

"Essentially, we need to go against the knee-jerk human reaction, which is the view that (zoo animals) need companionship, they need a large enclosure, and that they are only interested in the world visually," said Vicki Melfi of Whitley Wildlife Conservation Trust, which runs the Paignton Zoo in Britain.

She said animals more sensitive to smell should be accommodated, for instance, by not disinfecting their enclosures frequently so as not to wipe out scent markings. Other animals sensitive to sounds might be offered a dark, quiet corner to retreat to.

Wielebnowski suggested zoos might consider exercise equipment for animals to burn off energy.

Wayne Pacelle, president of the Humane Society of the United States, said measuring hormone levels may not tell the story as well as observing listless or repetitive behavior.

"You don't want a shell of an animal on display," he said. "Zoos are here to stay and they should make efforts to enrich animals' lives and they should ask a number of other questions about the suitability of certain species in captivity."


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Nanowire 'Paper Towel' Designed to Clean Up Oil Spills

LiveScience.com Yahoo News 30 May 08;

A mat of nanowires with the touch and feel of paper could be an important new tool in the cleanup of oil and other organic pollutants, scientists announced today.

MIT researchers and colleagues say they have created a membrane that can absorb up to 20 times its weight in oil, and can be recycled many times for future use. The oil itself can also be recovered.

Some 200,000 tons of oil have already been spilled at sea since the start of the decade.

"What we found is that we can make 'paper' from an interwoven mesh of nanowires that is able to selectively absorb hydrophobic liquids - oil-like liquids - from water," said Francesco Stellacci, an associate professor in the Department of Materials Science and Engineering and leader of the work.

The results are detailed in the May 30 online issue of Nature Nanotechnology.

In addition to its environmental applications, the nanowire paper could also impact filtering and the purification of water, said Jing Kong, an assistant professor of electrical engineering in the Department of Electrical Engineering and Computer Science and one of Stellacci's colleagues on the work. She noted that it could also be inexpensive to produce because the nanowires of which it is composed can be fabricated in larger quantities than other nanomaterials.

Stellacci explained that there are other materials that can absorb oils from water, "but their selectivity is not as high as ours." In other words, conventional materials still absorb some water, making them less efficient at capturing the contaminant.

The new material appears to be completely impervious to water. "Our material can be left in water a month or two, and when you take it out it's still dry," Stellacci said. "But at the same time, if that water contains some hydrophobic contaminants, they will get absorbed."

Made of potassium manganese oxide, the nanowires are stable at high temperatures. As a result, oil within a loaded membrane can be removed by heating above the boiling point of oil. The oil evaporates and can be condensed back into a liquid. The membrane - and oil - can be used again.

Two key properties make the system work. First, the nanowires form a spaghetti-like mat with many tiny pores that make for good capillarity, or the ability to absorb liquids. Second, a water-repelling coating keeps water from penetrating into the membrane. Oil, however, isn't affected, and seeps into the membrane.

The membrane is created by the same general technique as its low-tech cousin, paper. "We make a suspension of nanowires, like a suspension of cellulose [the key component of paper], dry it on a non-sticking plate, and we get pretty much the same results," Stellacci said.

In a commentary accompanying the Nature Nanotechnology paper, Joerg Lahann of the University of Michigan concluded: "Stellacci and co-workers have provided an example of a nanomaterial that has been rationally designed to address a major environmental challenge."

Cleaning up: Nano 'towel' soaks up oil spills
Yahoo News 30 May 08;

Researchers in the United States announced Friday they had created a paper-like membrane made of nano-scale materials that could clean up oil pollution and other chemical spills.

The substance can absorb up to 20 times its own weight in oil and be recycled again and again for future use, while the oil itself can also be recovered and used, they reported in the specialist journal Nature Nanotechnology.

The novel material comprises wires made of potassium manganese oxide at the scale of 20 nanometres, or 20 billionths of a metre, in diameter.

Together, the wires form a "spaghetti-like mat" whose strands have tiny pores that are good at absorbing liquids.

The membrane is covered with a hydrophobic, or water-repelling, coating. As a result, water cannot penetrate the membrane -- but oil can.

"What we have found is that we can make 'paper' from an interwoven mesh of nanowires that is able to selectively absorb hydrophobic liquids from water," said lead researcher Francesco Stellacci, an associate professor of materials science at the Massachusetts Institute of Technology (MIT).

The membrane appears to be completely impervious to water, he said.

"Our material can be left in water a month or two, and when you take it out, it's still dry. But at the same time, if that water contains some hydrophobic contaminants, they will get absorbed."

This also opens the way for using the membrane as a water filter, the team said.

Oil that is snared by the membrane can be removed by heating above the boiling point of oil. The oil evaporates and can be condensed back into a liquid.

In a press release, MIT said the membrane can be fabricated more cheaply than other nano materials. In the same way that cellulose is used for making conventional paper, a suspension is dried on a non-sticking plate.

In a commentary, published in the same journal, University of Michigan chemical engineer Joerg Lahann questioned whether the membrane would be used commercially, given the cost -- and possible toxicity -- of manganese oxide.

"Even so, it clearly provides a blueprint that can guide the design of future nanomaterials for environmental applications," Lahann said. "Many other examples are expected to follow and will confirm the potential of nanomaterials for protecting the environment."

On May 5, French-led technologists said they had beefed up the performance of a nano-powder that stores carbon dioxide (CO2), in a step towards creating a a filter to catch greenhouse gases from vehicle exhausts.

A cubic metre (35 cubic feet) of the new substance, called MIL-101, is able to capture 400 cu. metres (14,125 cu. feet) of CO2, thanks to pores 3.5 nanometres (billionths of a metre) across, according to the National Centre for Scientific Research (CNRS).


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