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.

But wildlife conservation groups oppose the project, the New York Times reports.

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

Photographer continues his decade-long documentation of our dependence on oil.

In Portland, a federal green building project takes shape.

Exploring the connections between the environment and the human psyche.

Production starts on important doc investigating the American hunger problem.

Factories, power plants and landfills face crackdown with EPA's new ozone proposal.

Council says "Non, merci" to tax on emissions.