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energy efficiency

Humanity's carbon budget set at one trillion tonnes

Earth

Humanity's carbon budget set at one trillion tonnes

To avoid dangerous climate change, we must burn no more than 25% of remaining fossil fuel reserves, two comprehensive new studies show

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Geothermal explosion rocks green energy hopes

Earth

Geothermal explosion rocks green energy hopes

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Could your trashcan solve the energy crisis?

Earth

Could your trashcan solve the energy crisis?

Features

Stacked LEDs could shine bright white light

Technology

Stacked LEDs could shine bright white light

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Earth

How to turn greenhouse gas into a clean fuel

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Earth

Geoengineering could dim lights on solar power

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Yeast and bacterium turned into gasoline factory

Earth

Yeast and bacterium turned into gasoline factory

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Gallery: Green innovation challenge

Earth

Gallery: Green innovation challenge

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Can oil from tar sands be cleaned up?

Earth

Can oil from tar sands be cleaned up?

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Green and mean: The downside of clean energy

Earth

Green and mean: The downside of clean energy

How do you choose between a wilderness and a power station? The tough choices associated with large-scale renewable energy projects are dividing the green movement

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Space

World's highest-energy laser begins operating

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Life

Batteries grown from 'armour-plated' viruses

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Earth

Are we safe in a new nuclear age?

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Technology

Yeast-powered fuel cell feeds on human blood

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