World's largest tidal power turbine unveiled in Scotland.

In Seattle, a green business finds new life in downed trees.

As the Gulf disaster abates, scientists ponder the future of a ravaged ecosystem.

Annual study ranks consumer sustainability around the world.

60-foot sailboat built from plastic bottles docks in Sydney.

Elegance and sustainability make friends at a seaside home in Singapore.

Economic recession blamed for decline.

The leak is plugged. But is it too late to restore public confidence?

BP installs new cap that it hopes will capture the crude leaking into the Gulf.

The story of a species on the brink of extinction.