Sustainability

This smart city is built from the ground up

Hybrid concept car changes shape while you drive

Zero-gravity gardening takes urban veggies for a spin

Toyota hybrids pass 4 million in global sales

Wind power's CO2-cutting impact disputed

Department of Energy tests wave power tech

Solar-powered moonrise – a streetlight concept

Big Solar and US team up to slash cost

Electric hydrofoil the ultimate wave rider

Zombie proof condos sell out