EPA tightens regs on drinking water toxicity.

Floods and high temperatures mark the year's climate data.

Sustainable energy transforms lives in rural Kenya.

Top court agrees to hear landmark eco lawsuit.

Company plants 'food oases' in a low-income Chicago communities, with a baked-in infrastructure to scale up fast.

Climate change doubt is an essential element of the Tea Party program.

Renewable power is cheaper and safer, military leaders say.

Coming soon to a dinner plate near you: genetically-enhanced Atlantic salmon.

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

Global forest loss slowed over the past decade, with less logging in the Amazon and widespread tree planting in China.