US natural gas driller to disclose chemical use.

The story of a species on the brink of extinction.

A U.S. military base goes solar.

Alex Kovatchev finds a useful function for old washing machine drums.

Atlantic coast under threat as tar balls wash up in Florida Keys.

Visionary architectural concept from Holland, so advanced we don't understand it.

Actress Sigourney Weaver calls for action on ocean acidification.

On Earth Day 's 40th anniversary, John Kerry warns that climate change is the environment's biggest hurdle yet.

Sneaker giant ditches the shoebox for a more sustainable alternative.