Feature

Rural mothers become solar engineers

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

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

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

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.