The Department of Energy unveils its new home energy ratings tool.

California company launches e-waste recycling network.

Trash-to-energy projects gain support on the West Coast.

World's largest tidal power turbine unveiled in Scotland.

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

A U.S. military base goes solar.

The switch to efficient lighting will have a significant impact on emissions – and climate change.

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