The fastest rate of deforestation in Indonesia is occurring in central Sumatra’s Riau province, where some 4.2m hectares (65%) of its tropical forests and peat swamps have been cleared for industrial plantations in the past 25 years. Under the Reducing emissions from deforestation and degradation (Redd) scheme $30bn a year could be transferred from rich countries to the owners of endangered forests. But experts on all sides of the debate - from international police to politicians to conservationists - warned that the scheme may be impossible to monitor and may already be leading to fraud24 other photos and issues on deforestation in Sumatra on the Guardian website.