We talk about carbon dioxide - but the real climate villain might be hiding in plain sight. In this powerful TED Talk, ...

The satellite image, at left, helped Piedmont Natural Gas identify an underground gas leak on a major distribution line near Greenville, S.C. At right, the same area two months later, after repairs ...

The levels of the crucial heat-trapping gases in the atmosphere reached historic highs last year, growing at near-record fast paces, according to the U.S. National Oceanic and Atmospheric ...