Annual study ranks consumer sustainability around the world.

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

First UK cycle share scheme to launch next week.

Japanese "solar sail" propelled by the sun.

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

Economic recession blamed for decline.

Company officials are cautiously optimistic after three days of encouraging test results.

Report finds dramatic reductions in prohibited logging activities around the globe.

26-hour flight confirms viability of emissions-free air travel.