A greener process for extracting rare-earth elements could mean higher prices but clearer consciences for tech manufacturers.
Tell grandma to say goodbye to the rubber ham -- it's kale season.
Pat Mulroy preached conservation while backing growth in Las Vegas.
European oil majors are calling for international climate negotiators to put a price on carbon. Some green groups are skeptical.
The Paddle in Seattle is just a hint of this city's commitment to fighting climate change. Next up: Eliminating its carbon footprint completely.
This Republican presidential contender gets a lot of credit for his views on the climate, but his record on the issue has been mixed.
If the trial works, The Ocean Cleanup Array could clean up half of the trash in the Great Pacific Garbage Patch.
The goal of this massive sperm bank is to protect heritage breeds from extinction -- and also to make them more climate-hardy.
As the world's ice sheets melt, cities like Shanghai could be heading underwater.