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You're deep in the woods when a tree catches fire. Now what?

Sierra's sixth annual ranking of America's greenest universities

Turn an empty container into a wall-mounted charging station

Are natural insect repellents better than DEET? That depends on how risky the bite is.

These magnificent trees would leave even the Lorax speechless

You can hike to them, dance underneath them, appreciate them from afar, and listen to them up close.

A visitor finds refuge—and tales of deprivation—in the Grand Canyon's hidden alcoves

A list of A-list species, from Beyonce to Schwarzenegger

The forests of the Olympic Peninsula have always been pillaged, and there's nothing law enforcement can do about it

Otero Mesa, the remnant of a forgotten grassland, looks for a little recognition

Tracking the Pacific fisher with road kill dangled them from trees

Hitting the links this weekend at your local "green" golf course? You may want to check its bona fides first.

Detritus of Pennsylvania's shale gas boom

Gas prices, CO2 levels—it's all going up. Which is why more and more people are ditching gas-guzzlers for bikes.

Utah chooses coal mining over its natural wonders

The bald cypress of southern Louisiana is resilient and rot-resistant—and so is Dean Wilson, its most ardent defender

A concerted, worldwide family-planning campaign can be just as effective at reducing carbon output as conserving electricity, trapping carbon, or using alternative fuels.

What happens when you dress for the air, not the water

Scientists disguised as pandas