Ecotourism: Green problem or green solution?

New study shows some U.S. states are happier than others

The Apocalypse business

Ecollywood: Chandra Wilson and Stephanie Jacobsen

Geoengineering blunder

Leading eco-travel company shelves carbon offsetting

Enter MNN's Oasis of the Seas contest to win a free cruise

'Reaching the Animal Mind'

Kate Walsh fronts new campaign to protect sea turtles

'Earth: The Sequel'

Destination of the Week: Atlanta

China's different shade of green