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On its way to becoming the nation's largest grassroots conservation organization, the Sierra Club made its mark in the annals of mountaineering

Texas-style laws trust polluting companies to police themselves

Pity the poor abalone, too tasty for its own good

The effort to preserve California's Sierra Nevada won a major victory

What happens when a protected predator eats an endangered species?

Cure-all lizards! Bulldozer ants! Voracious spiders! A high school biology class finds high drama among the creepy-crawlies

Sierra Club public-lands lobbying team supports grassroots activists

Paddling into Lake Superior's past

Today's movement to restore wild places began more than half a century ago in a shack in rural Wisconsin.

Earth's best friend, David Brower, 1912-2000

The pleasures of Louisiana's Atchafalaya River Basin urge you to draw, dance, or just revel in the natural world. It's easy to forget there's a water war going on.