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Green roofs will be worth $7 billion by 2017

Report: Algae biofuels not yet sustainable

Tekked-out Prius is definitely one very techie hybrid

Toyota Scion IQ gets EV option in the US, with a twist

Audi F12 electric car prototype showcases best tech

California array is Navy’s new top solar gun

This self-sufficient floating home could be yours

Meet the hyper-connected phone booth of the future

This micro-algae facade powers a net zero house