Arctic seas turn to acid, putting vital food chain at risk
With the world's oceans absorbing six million tonnes of carbon a day, a leading oceanographer warns of eco disaster
(This article appeared on p16 of the News section of the Observer on Sunday 4 October 2009. It was published on guardian.co.uk at 01.58 BST on Sunday 4 October 2009. It was last modified at 11.12 BST on Wednesday 7 October 2009.)
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