A new report finds that the U.S. charging network is rapidly growing as private developers outpace a $5 billion federal program.

Waste-to-energy was sold as a greener option to landfill, but evidence is mounting that burning garbage is far from clean.

This fall's U.N. climate talks will be held in a high-poverty city on the edge of the Amazon to demonstrate what still needs to be done.

The U.N. has published a report saying June was marked by below-average precipitation and higher-than-average temperatures across Afghanistan.