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Science Ocean acidity increases surprise researchers

Extra carbon dioxide from the atmosphere has ended up in the world's oceans, increasing the acidity of the sea, scientists say. Reducing carbon emissions could help solve the problem.

AP Photo/Centre for Marine Studies, The University of Queensland, Ove Hoegh-Guldberg, File

Oceans' rising acid levels have emerged as one of the biggest threats to coral reefs, acting as the "osteoporosis of the sea" and threatening everything from food security to tourism to livelihoods, the head of a U.S. scientific agency said Monday.

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