China's dams in the danger zone

China has more dams than any other country, and many of them are in Sichuan, an earthquake-prone, mountainous region. The majority of them produce hydroelectricity. The region is well-placed to supply power to large industrial cities down the Yangtze valley, and when the dams were built this must have appeared a logical strategy. Now it looks foolhardy. Hundreds of Sichuan's dams have been damaged by the earthquake and could collapse during the coming monsoon season. (Editorial)