Global investment in renewable energy powered to record $257 billion in 2011, according to UN report

With bleak European prospects, clean energy companies focus on other markets

86 year-old reintroduced indigenous giant toirtoises to the island he bought in 1962

New York designer teams with Dedon for a collection of eco-minded seating

Conservation group American Rivers urges support for clean water protection

New tech looks to harness consistently powerful winds above deep water

No natural resources? No problem. Education ensures economic success

Fruit foraging zone to be planted in the heart of the city

Innovation group challenges people to re-imagine the city of the future