GM says it will launch the Chevy Volt in a few months. It will go for $41,000 -- and owners can apply for up to $7,500 in tax credits. Ethan Miller/Getty Images hide caption

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Clay Mullins (left), brother of mine disaster victim Rex Mullins, listens as Upper Big Branch miner Stanley "Goose" Stewart tells the House Education and Labor Committee that the mine "was a ticking time bomb" because of problems with ventilation and explosive methane and coal dust. Jon C. Hancock/AP hide caption

itoggle caption Jon C. Hancock/AP

Mine workers stand at the entrance of the Upper Big Branch coal mine on April 9, a few days after an explosion killed 29 men. Matt Sullivan/Getty Images hide caption

itoggle caption Matt Sullivan/Getty Images

Richard Bradford used to walk and take photos in the mountains near his home in West Virginia. He says he can't do that anymore because his home is nearly surrounded by Massey Energy mountaintop removal projects. Frank Langfitt/NPR hide caption

itoggle caption Frank Langfitt/NPR