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energy efficiency

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Earth

Waste wafers give solar power a silicon boost

A simple method of recycling refined silicon from microchips could help ease the shortage of the material for photovoltaic panels

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Depleting oil supplies threaten 'meltdown in society'

Earth

Depleting oil supplies threaten 'meltdown in society'

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Earth

Brazil rides biofuel bandwagon to Africa

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Light-harvesting nanowire could drive tiny devices

Technology

Light-harvesting nanowire could drive tiny devices

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Earth

Mechanical 'fish' could tap turbulence for energy

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Pentagon backs plan to beam solar power from space

Earth

Pentagon backs plan to beam solar power from space

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Earth

Go nuclear for a third industrial revolution, says EC

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Earth

Semiconductor uses the sun to split water

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Grass-munching bugs could charge rural phones

Technology

Grass-munching bugs could charge rural phones

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Rocks could be novel store for wind energy

Earth

Rocks could be novel store for wind energy

Can a pocket of porous rock beneath the American Midwest transform the way we use wind energy?

Features

Earth

'Smart roofs' can keep you cool and save energy

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Earth

Redesigned petrol engine promises green gains

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Technology

Computers learn to fly kites for renewable energy

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Earth

Antarctic pod makes way for green research

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