Coal Ash

Coal ash threatens South Georgia

Tr-Ash talk: Mercury In the showerhead

Clean coal? The price of water pollution

America's 10 worst man-made environmental disasters

Engineer wins 2009 Purpose Prize for inventing green bricks

Basalt formations may turn CO2 into limestone

New cement cuts greenhouse gases by 90%

TVA to spend $43 million on projects in coal waste spill area

Battle over TVA coal ash in Alabama

Political Habitat: Sludge under the bridge

Scenes from the TVA coal disaster