Five years ago, the Washington Post announced that the oceans would run out of oxygen due to global warming.
Global warming could deplete the oceans’ oxygen – with severe consequences – The Washington Post
The greatest expansion of life on earth occurred in the oceans 540 million years ago when CO2 was at its peak. Temperatures were 10C warmer. atmospheric CO2 levels were more than 15 times higher than they are now, and corals and shellfish evolved.