Mekong conundrum: does dammed mean damned?
The roaring currents of the Mekong have long enchanted travellers, inspired explorers and sustained about 65 million people living off the world's largest freshwater fisheries. But environmentalists warn that the "Amazon of Asia" - the river with the second-richest biodiversity in the world - is under dire threat from hydropower dams, including the latest to be proposed: the Xayaburi dam in Laos.