Could President Obama Win A Third Term?

Four U.S. presidents have completed a second term since that became the limit, and three of them might well have had a shot at winning again: Dwight Eisenhower, Ronald Reagan and Bill Clinton.

How Fracking Is Fueling A Power Shift From Coal To Gas

Driven by new regulations and fracking, more coal power plants are retiring for cheaper, cleaner-burning natural gas. But scientists have yet to work out the fossil fuel’s imperfect climate footprint.