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Irreversible changes in the marine life of CO2

July 3, 2015 Updated 06:52 BST

A major report warns that life on the seas irreversibly changed if the CO2 emissions of the industrial society are greatly reduced.

Twenty experts in the journal Science, say the oceans warm, loss of oxygen and become acidic - during our response to carbon dioxide.

German scientists have investigated an event 55 million years ago, which might shed light on the challenges of today.

Roger Harrabin reported.

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