In an interview broadcast Sunday, President Obama acknowledged that Iran would benefit economically from the nuclear weapons agreement that his administration negotiated with Tehran, but contended that it would not be a “game-changer.”

Ten widely cited climate scientists say the State Department’s review of the proposed Keystone XL pipeline should include a “serious” evaluation of how enabling Canadian oil sands development will affect the planet’s climate.

House Democrats introduced legislation Tuesday that would require a comprehensive study of the health dangers related to mountaintop removal coal mining. More controversially, the bill would also halt all new mountaintop coal projects until the health study is complete.

A conservative advocacy group says it's spending almost $1 million on ads to corral support for an upcoming Senate effort to overturn Environmental Protection Agency rules that require cuts in toxic emissions from coal-fired power plants.

Republicans are pressing Senate Finance Committee Chairman Max Baucus (D-Mont.) to buck his leadership and use his authority in the payroll tax conference to green-light the Keystone oil sands pipeline.

The CEO of the company lobbying to build a pipeline bringing Canadian oil sands to Gulf Coast refiners has a warning for green groups opposing the project: The oil sands will be developed with or without expanded U.S. imports.