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energy efficiency

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Technology

Lung-style fuel cell needs less bling for more oomph

Using "bronchial" structures to channel oxygen and hydrogen to a fuel cell's catalyst produces a device that is more efficient and needs less platinum

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Green machine: Fighting the efficiency fallacies

Earth

Green machine: Fighting the efficiency fallacies

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Earth

The next best thing to oil

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Innovation: Reinventing urban wind power

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Innovation: Reinventing urban wind power

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Earth

Which oil-mopping technology will win $1.4m X prize?

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Earth

E. coli engineered to make convenient 'drop-in' biofuel

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US food waste worth more than offshore drilling

Earth

US food waste worth more than offshore drilling

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Green machine: A salty solution for power generation

Earth

Green machine: A salty solution for power generation

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Technology

Alternative nuclear fuel is surprisingly reactive

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Green machine: A new push for pond scum power

Earth

Green machine: A new push for pond scum power

Interest in biofuel from algae has reignited, with billions of dollars being poured into research. Can today's efforts succeed where others failed?

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Earth

Stabilisers will let deep-sea wind turbines stand tall

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Earth

Hot electrons could double solar cell efficiency

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Space

Mystery glitch? Blame it on the sun

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Technology

Green machine: Bacteria will keep CO2 safely buried

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