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.

A Polish architecture firm's visionary concept for a net-zero skyscraper.

Condoms for a cause.

From melting ice caps to volcanic hot springs, Roni Horn's art is inspired by Iceland's shifting landscape.

Community Shop opens its doors at the ACE Hotel in Palm Springs.