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Technology

Reincarnated material turns waste heat into power

Destroying and then rebuilding the alloy lets it scavenge waste heat and turn it into electricity much more efficiently than existing "thermoelectric" materials

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Solar-power paint lets you generate as you decorate

Earth

Solar-power paint lets you generate as you decorate

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The microchips that could heat your home

Technology

The microchips that could heat your home

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Biofuel blends not as green as they seem

Earth

Biofuel blends not as green as they seem

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Souped-up battery prepares to slay the gas guzzlers

Earth

Souped-up battery prepares to slay the gas guzzlers

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Turning CO<SUB>2</SUB> back into hydrocarbons

Earth

Turning CO₂ back into hydrocarbons

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Earth

Green invention special: Long-life solar cells

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Solar cell speeds hydrogen production

Technology

Solar cell speeds hydrogen production

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The power walk that charges your phone

Technology

The power walk that charges your phone

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Biofuels emissions may be 'worse than petrol'

Earth

Biofuels emissions may be 'worse than petrol'

When changing land use is taken into account, biofuels could actually increase greenhouse gas emissions, say two major new studies

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Earth

US pulls the plug on flagship clean coal project

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Earth

Super-efficient car to green up the highway

Features

Earth

Algae hold the key to the biofuel conundrum

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Earth

Pitter-patter of raindrops could power devices

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