Energy

The long-delayed project is a jobs generator to some and an ecological disaster to others. Ahead of a key Senate vote, we revisit what the Keystone XL pipeline would do and why it's so contentious.

China and the U.S. account for more than a third of greenhouse gases — making it vital that any broad climate plans include the pair.

Scientists say a new deal between the U.S. and China on greenhouse gases is a positive move toward new models for controlling emissions, but that it won't keep the Earth from dangerous levels of warming.

Residents of Denton, Texas, voted Tuesday to ban hydraulic fracturing in their city. It's the first time a city in the state — where energy is king — has voted to ban fracking.