China will move at least four million more people—including many who've already been moved once—as the Three Gorges Dam, the world's largest hydroelectric project, nears completion at the end of next year. The new relocations were announced amid reports that the dam was causing landslides, soil erosion, polluted drinking water, and seepage from submerged industrial sites.
A local official was quoted in the state media as saying the relocations were necessary to "protect the ecology of the reservoir area." Senior engineers on the project have spoken out recently to urge action on what one called "ecological deterioration caused by irrational development." Landslides crashing into the reservoir have already caused huge waves that have eroded the shoreline.