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US considers nuclear-powered assault ships

Technology

US considers nuclear-powered assault ships

Rocketing fuel prices make nuclear-powered warships an attractive option for the US navy – but how safe are they?

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Technology

US nuclear recycling plans raise proliferation risks

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Earth

Algae oil promises truly green fuel

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Next generation of nukes may not happen

Technology

Next generation of nukes may not happen

News

Exotic nitrogen could offer safe rocket fuel

Technology

Exotic nitrogen could offer safe rocket fuel

News

The greening of Silicon Valley

Earth

The greening of Silicon Valley

Features

Interview: Bring on the solar revolution

Earth

Interview: Bring on the solar revolution

Opinion

'Self-digesting' biofuel plants could ease food crisis

Earth

'Self-digesting' biofuel plants could ease food crisis

News

To make the most of wind power, go fly a kite

Earth

To make the most of wind power, go fly a kite

Features

When burning gas is good for the planet

Earth

When burning gas is good for the planet

Rural families are slashing their energy costs, improving indoor air quality and helping preserve local forests by using biogas plants

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Earth

Fuel prices hit US drivers where it hurts

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Earth

Fungi lock depleted uranium out of harm's way

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Earth

Women farmers face eviction in biofuels boom

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Earth

Insects left disfigured by nuclear radiation

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