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energy efficiency

Steam power takes to the road again

Earth

Steam power takes to the road again

Eighty years after it went out of fashion, steam is back – but this time it's clean and green, says Vivien Marx

Features

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Earth

Is Google gobbling up too much power?

News

Invention special: Green technology

Technology

Invention special: Green technology

News

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Earth

Fuel thinner turns diesel cars into greener machines

News

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Earth

Climate change: how Obama and McCain compare

News

US House lifts 27-year ban on coastal drilling

Earth

US House lifts 27-year ban on coastal drilling

News

Mean machines go green

Earth

Mean machines go green

Features

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Earth

Editorial: A helping hand for clean technologies

Opinion

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Earth

Invention: Oil-sands digester

News

New bug ferments green fuel on the cheap

Earth

New bug ferments green fuel on the cheap

Bacteria that ferment plant pulp at higher temperatures could make producing cellulosic ethanol more economically viable

News

Earth

International nuclear rules bent for India deal

News

Technology

'Formula Zero' kart race could drive fuel cell technology

News

Earth

Offshore oil drilling in the US: what's at stake?

News

Earth

Green fuel for the airline industry

Features

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