A new study suggests that black carbon could be the cause of Himalayan glaciers melting.
The underground coal fire that has slowly consumed Centralia, Pa., isn't unusual. Many such fires burn around the world.
The Centralia, Pa., coal fire is expected to drive out the town's few remaining residents.
Low-flow toilets save water, but they haven't always worked as well as homeowners would like.
The eco-conscious city plans to build more than 680 miles of new bikeways in the coming two decades at a cost of $613 million.
Coats for Cubs program of the Humane Society uses donated fur coats to comfort orphaned or impaired wildlife.
The fossil fuel-dependent island state is on track to receive 40 percent of its electric power from renewable sources by 2030.
For a home renovation, what are the best water-saving options among new toilets?
Contrails from airplanes impact temperatures at Earth's surface. But do they raise or lower them?
Golden State lawmakers ask which is more important: building the nation's largest solar-energy farm or protecting a fragile ecosystem?
In a home renovation, the owners decided to install a cedar shake roof, but it buckled in the first serious rain.
New killer whale babies lift the Northwest's endangered orca population out of the red zone (somewhat).
Joe Rios typifies a new generation of environmentally conscious workers who are thinking green.
In a grass-roots effort, a Los Angeles community pushes the plant-saving practice of reusing water from showers, baths, sinks, and washers.
The conservation group, made up mostly of older women, helps the US government track illegal use of public lands in the US West.
An estimated 20,000 gallons of crude oil remain trapped in the gravelly beaches of Prince William Sound, Alaska, long after the Exxon Valdez oil spill..