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energy efficiency

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Earth

Cheap catalyst can make and break hydrogen

It could allow surplus energy from wind and solar farms to be stored as hydrogen and released it to the electricity grid when it's needed

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Solar-powered night-flying plane makes its first 'flea hop'

Technology

Solar-powered night-flying plane makes its first 'flea hop'

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Extreme oil: Scraping the bottom of Earth's barrel

Earth

Extreme oil: Scraping the bottom of Earth's barrel

Features

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Plenty more oil, but use it wisely

Opinion

Climate control for your desk

Earth

Climate control for your desk

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Technology

Split-personality home routers can cut net energy use

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Technology

Safety flaws in US next-gen nuclear reactors

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First osmosis power plant goes on stream in Norway

Earth

First osmosis power plant goes on stream in Norway

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Lotus leaf solar cells soak up more power

Technology

Lotus leaf solar cells soak up more power

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Nuclear fuel: are we heading for a uranium crunch?

Earth

Nuclear fuel: are we heading for a uranium crunch?

Fears of the warming effect of fossil fuels have pushed governments to reconsider nuclear power – but could a uranium shortage scupper their plans?

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Earth

Five eco-crimes we commit every day

Features

Earth

US bets $150m on high-risk renewable energy

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Earth

Low-carbon road map for China

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Technology

Super-efficient cars racing to win the X prize

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