The world's sea levels could rise twice as high this century as UN climate scientists have previously predicted, according to a study.The Intergovernmental Panel on Climate Change proposes a maximum sea level rise of 81cm (32in) this century.
But in the journal Nature Geoscience, researchers say the true maximum could be about twice that: 163cm (64in).
They looked at what happened more than 100,000 years ago - the last time Earth was this warm.
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