Oxygen is leaving the ocean

And that's not good. Over the past 50 years, the volume of the ocean with no oxygen at all has quadrupled, while oxygen-deprived swaths of the open seas have expanded by the size Europe; we have lost 2% of the oxygen in the ocean. Why? Global warming and pollution. Warmer seawater both holds less oxygen and turbocharges the worldwide consumption of oxygen by microorganisms. Meanwhile, agricultural runoff and sewage drives suffocating algae blooms.