Earth
Green Machine: Markets hint at 100-year energy gap
A study of share prices suggests investors don't expect alternative-energy technology to take off until 2140 – a century after we run out of oil
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Earth
Green machine: Heat scavengers come in from the cold
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Earth
Cold climates no bar to biogas production
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Earth
Solar power could crash Germany’s grid
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Technology
Work light twice as hard to make cheap solar cells
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Technology
Charge your phone with a beach towel
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Physics
Out-of-this-world proposal for solar wind power
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Technology
Oil company to build longest floating vessel ever
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Technology
Japan to begin drilling for methane in undersea slush
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Technology
Born-again solar cells are more efficient
Solar cells can be made more efficient over their lifetime if they continually regenerate their light-harvesting mechanisms
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Environment
Green machine: Squeezing solar juice from jellyfish
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Technology
Edible crystals could store hydrogen fuel
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Earth
Briefing: How bad is the new Gulf oil rig fire?
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Earth
Mobile chargers could keep electric cars juiced up
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