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Earth

Hydrogen brewing gets an electrical boost

A zap of electrical charge helps microbes ferment almost all of the hydrogen from organic waste – the process might one day provide greener fuel

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Earth

The return of coal poses a huge climate threat

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China special: The solar power king

Earth

China special: The solar power king

Features

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Health

HIV infants at risk from TB vaccine

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Life

Flying mammal is closest primate relative

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Health

TB vaccine poses threat to HIV-positive babies

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Earth

Bush administration's nuclear plan criticised

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Earth

'Humanity at risk' from ecological debt

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Solved: The mystery of how AIDS left Africa

Life

Solved: The mystery of how AIDS left Africa

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Earth

Hydrogen power lights up the seas

A fuel cell is being used to power a lighthouse on England's North Sea coast, replacing a cabled electricity source that was prone to wave damage

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Earth

One third of primate species on the brink

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Earth

Waste wafers give solar power a silicon boost

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Life

Amphetamine addiction curbed by dentists' jab

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Life

Immunity genes bolster fight against infection

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