A two-year-old company aims to make recycling worth everyone's while: RecycleBank tracks your recycling output and lets you earn points redeemable at stores
Climate change means more than warming at the poles. It can intensify disease and famine and endanger human health
On Saturday, March 29, people all over the world turned off their lights for one hour. Why?
A lead scientist at the Nature Conservancy makes the case that, for lasting success, environmentalists need to protect and foster the diversity in their own ranks
Tree-hugging goes only so far. The modern-day breed of environmentalist has bigger, better, higher-tech solutions for fixing global climate change
The EPA tightened restrictions on ozone, but why is the new limit still higher than what science recommends? Critics say it comes down to politics and money
Waterways are critical for cleansing the land of polluting runoff, but an excess of crop growth particularly biofuel crops could dangerously clog our rivers and streams
In the new wikiworld, the Internet brings together a man with a plan, companies with money and an international network of brainiacs to power a new light
Messing with nature caused global warming. Messing with it more might fix it
Acciona Energy doesn't just capture the sun's light to generate energy it corrals the sun's heat. Now the Spanish renewable power company has placed its first American operation in the desert flanking Las Vegas
An esteemed explorer and environmentalist, Will Steger will make a 1,400-mile dogsled trip across the Arctic next month, at 64. And he'll bring cameras, so we can watch
Two new studies show that biofuels aren't the solution to global warming and may even exacerbate the problem