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Two of Britain's leading environmental thinkers say it is time to develop a quick technical fix for climate change.

Writing in the journal Nature, Science Museum head Chris Rapley and Gaia theorist James Lovelock suggest looking at boosting ocean take-up of CO2.

Their idea, already being investigated by a US firm, involves huge flotillas of vertical pipes in the tropical seas.

The two scientists say they doubt that existing plans for curbing carbon emissions can work quickly enough.