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.

Stunning images of Iceland's Eyjafjallajokull volcano.

Wood Turner, head of Climate Counts, discusses the relationship between the media and the environment.

Sneaker giant ditches the shoebox for a more sustainable alternative.

A journey into community supported agriculture continues. On the menu: Poached arctic char with Italian dandelion contorni.

How to tackle climate change — and what it means for the economy.

Shawn Traylor's kicks off his food co-op cooking odyssey. On the menu: Beef shortribs with beet orzo and a pea shoot gremolata.

A look at 350.org's planet-scale art project for the climate.