According to a report by from the International Programme on the State of the Ocean (IPSO), the oceans are facing multiple threats.

"They are being heated by climate change, turned slowly less alkaline by absorbing CO2, and suffering from overfishing and pollution.

It says conditions are ripe for the sort of mass extinction event that has afflicted the oceans in the past.

We have been taking the ocean for granted. It has been shielding us from the...
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