Earth Matters

The greenest parks in America

Pittsburgh to play host again

California may be first to ban power-hungry big-screen TVs

Sweden burns bunnies for biofuel

Evening bat flights: One of nature's great spectacles

One of America's largest utility providers may switch from coal to natural gas

Regulation nation

Australia's red dust storm good for the ocean

Power plants clean air, pollute waterways

Vegetarian spider loves leaves, not bugs

Tim DeChristopher, the last auction hero

Monkey mamas in love