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energy efficiency

Second well on the way to cap Deepwater Horizon

Earth

Second well on the way to cap Deepwater Horizon

Capping the flow of oil from the stricken rig by drilling another well is a huge technical challenge, but it has to work

News

Green machine: Recycled batteries boost electric cars

Earth

Green machine: Recycled batteries boost electric cars

News

Wonderfuel: Welcome to the age of unconventional gas

Earth

Wonderfuel: Welcome to the age of unconventional gas

Features

Green machine: Cars could run on sunlight and CO<SUB>2</SUB>

Earth

Green machine: Cars could run on sunlight and CO2

News

Sailing ships could harvest fuel from the oceans

Earth

Sailing ships could harvest fuel from the oceans

News

Biofuels learn to eat less

Earth

Biofuels learn to eat less

News

Green machine: Hitting the lights in wasteful offices

Earth

Green machine: Hitting the lights in wasteful offices

News

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Space

Darwinian spacecraft engine to last twice as long

News

Why deep-water oil spills do their damage deep down

Earth

Why deep-water oil spills do their damage deep down

News

What the climate bill means for the US way of life

Earth

What the climate bill means for the US way of life

The American Power Act would at last set limits on US greenhouse gas emissions – here's what it could mean for you, wherever you live

News

Space

Maiden voyage for first true space sail

News

Earth

Oil industry failed to heed blowout warnings

News

Earth

Bugs will give us free power while cleaning our sewage

News

Technology

Bertrand Piccard: Flying around the world on sunlight

Opinion

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