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energy efficiency

World's smallest fuel cell promises greener gadgets

Technology

World's smallest fuel cell promises greener gadgets

Portable devices could be hydrogen powered if fuel cell technology could be made smaller – a design 3 mm across might do the trick

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Green fuel technologies pick up speed in 2008

Earth

Green fuel technologies pick up speed in 2008

News

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News review 2008: Oil shock hits the world

News

Is the Exxon Valdez spill site finally clean?

Earth

Is the Exxon Valdez spill site finally clean?

News

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Earth

Switch to biofuels boosts insect pest

News

Platinum-free fuel cell promises cheap, green power

Earth

Platinum-free fuel cell promises cheap, green power

News

Super-biofuel cooked up by bacterial brewers

Earth

Super-biofuel cooked up by bacterial brewers

News

How to unplug from the grid

Earth

How to unplug from the grid

Features

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Earth

Canadian tar plan threatens millions of birds

News

Crystals turn roads into power stations

Earth

Crystals turn roads into power stations

By placing piezoelectric crystals under the asphalt that convert vibration into electricity, Israeli engineers hope to harvest energy from passing vehicles

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Earth

Ten ways to save the world

News

Technology

Smart drug implant has batteries included

News

Earth

Whatever happened to the hydrogen economy?

Features

Earth

Heat we emit could warm the Earth

News

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