Sales of the Nissan Leaf and Tesla Model S helped the industry reach this milestone. Meanwhile, Tesla plans to repay a government loan nine years early.
Companies from Japan and Canada want to build the mine on land held sacred by Native Americans, and the U.S. Forest Service may just say OK.
European officials have raided the oil companies' offices, and now a U.S. senator wants an investigation launched on this side of the pond.
BP says it shouldn't have to pay so much to help companies hurt by the Deepwater Horizon spill. It wants the U.K. government to ask the U.S. government for help.
The Gray Lady wants the president to hurry up and take executive action to fight global warming, because Congress obviously isn't going to do anything.
Refining Canadian tar-sands oil creates mountains of filthy black waste, as the residents of Detroit are discovering. Other American communities can look forward to the same.
Kroger has plans to feed food waste to bacteria, where it will be anaerobically digested in a vat to release methane to create energy.
Glaciers contain a tiny share of the world's land ice, but their rapid melting is contributing to nearly one-third of the world's sea-level rise.
Environmentalists were dismayed by draft fracking rules released a year ago, but hoped the administration would tighten them up in the next round. The opposite happened.