Ocean water contamination
Continued emissions of carbon dioxide from all directions are raising the oceans' acidity to an irreversible level. In the past couple of hundred years the world's oceans have absorbed about a quarter of the carbon dioxide produced by human activities, and the current rate of acidification is much more rapid than at any time during the past years according to the researchers. Adding chemicals to the oceans to try to counter acidification was likely to be expensive, only partly effective at local shores and could pose unknown risks.
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