Mexico is the first developing nation to make its climate action pledge ahead of U.N. talks in Paris -- and it's actually pretty ambitious.
This year's Arctic sea ice hit a new low.
City officials say the shift to 100-percent renewable energy is a way to save cash, not the planet.
Did the iPhone cleanse change my life? No. Was it difficult? Not remotely.
Candles? Curly-Q bulbs? LEDs? What's an eco-minded reader to do? Umbra's answer is brilliant.
Utility companies claim solar-powered homes are raising everyone else's electric bills.
Scientist Ken Caldeira explains.
I'm sorry -- we need to talk about this.
The owner of a single-room occupancy building in San Francisco's Chinatown takes aim at good old-fashioned clothesline drying.