Solar power plants could supply the whole world with clean energy, says scientist Gerhard Knies.
How cooking with solar is saving women's lives in a Darfur refugee camp.
Californian vineyards are going solar to make their grapes really green.
Could flying wind farms help beat global warming?
The sleek solar-powered vessels that can cut fuel costs by 90 percent.
Cutting-edge designs from handbags to bikinis that show the potential of solar power.
The power source that's as thin as a piece of paper.
What energy will power your home in 2020? Find out in our quiz.
Marooned in the wilds with no power? These green gadgets could help
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Can renewable fuels alone solve the energy crisis? Send us your photos and videos via iReport.
Space vacation Fancy a trip among the stars?
Beam me up! Are we close to teleportation?
Kids connect Virtual class- rooms go global
Curing cancer Can we make cancer history?
Internet mobs Angry bloggers exert justice
Facebook 2.0 Are virtual worlds the next step?
