Feature

The backpacking guru's legacy marches on

In Latin America, Catholics are standing up to those who covet their gold and timber

Photographers David Liittschwager and Susan Middleton give undersea creatures the star treatment

Efficient homes are only the start of a sustainable community

From siting to size to solar, how one activist grappled with the decisions that went into building his ecofriendly home

Student activists rise to the planet's biggest challenge

What our grandparents can teach us about saving the world

Renowned wildlife photographer Frans Lanting chooses his favorite images--the ones that made a difference

Excerpted from Al Gore's comments at Sierra's climate forum

You don't need to hike the John Muir Trail to open up new worlds. Downtown Los Angeles to the Beach will do.