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energy efficiency

Total safety an illusion for Japan's nuclear restart

Earth

Total safety an illusion for Japan's nuclear restart

Some Japanese nuclear reactors, mothballed since the 2011 Tohoku quake, may soon restart. But nature can outpace new safety precautions, warns a geophysicist

Comment

US and China's emission cuts may not be enough

Earth

US and China's emission cuts may not be enough

Analysis

Should we all get out of fossil fuels now?

Earth

Should we all get out of fossil fuels now?

Comment

Republican win corners Obama in key US climate battle

Earth

Republican win corners Obama in key US climate battle

Comment

I want to build solar cells thinner than a human hair

Technology

I want to build solar cells thinner than a human hair

Opinion

Methane cuts won't buy us time on climate change

Earth

Methane cuts won't buy us time on climate change

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Bottling Britain's wind energy

Bottling Britain's wind energy

Careers

EU emissions target isn't as ambitious as it seems

Earth

EU emissions target isn't as ambitious as it seems

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What would a world without fossil fuels look like?

Earth

What would a world without fossil fuels look like?

Features

Lighting cities with cheap, glaring LEDs is a dim move

Earth

Lighting cities with cheap, glaring LEDs is a dim move

The roll-out of cheap energy-saving street lights with a bluish glare has little regard for people or wildlife. There is a better way, says Jeff Hecht

Comment

Space

One Per Cent

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Technology

Physics Nobel won for invention of blue LEDs

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Technology

Snowflake-shaped networks are easiest to mend

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Technology

Sunflower solar harvester provides power and water

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