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Earth

US still responsible for most CO₂ emissions

Europeans import nearly twice as much carbon dioxide per head as US citizens – but the US is still the world's largest emitter

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Technology

The self-charging cellphone

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The US is lagging on nuclear reactor technology

Earth

The US is lagging on nuclear reactor technology

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Hybrid fusion: the third nuclear option

Earth

Hybrid fusion: the third nuclear option

Comment

Will the anaconda or the oyster rule wave power?

Earth

Will the anaconda or the oyster rule wave power?

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Innovation: Bloom didn't start a fuel-cell revolution

Earth

Innovation: Bloom didn't start a fuel-cell revolution

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Earth

New US reactors still awaiting safety approval

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Technology

Silicon wire forest makes wearable solar cells

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Smoke bomb: The other climate culprits

Earth

Smoke bomb: The other climate culprits

Features

For sustainable architecture, think bug

Earth

For sustainable architecture, think bug

Termites and wasps could help us design the eco-cities of the future

Features

Earth

Sun-powered water splitter makes hydrogen tirelessly

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Technology

Pliable power pack will let gadgets feed on your body

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Technology

More is merrier for wireless power supply

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Earth

Organic crystals promise low-power green computing

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