From Paul Beckwith
Oxygen Level Decrease in Air from Climate Change
Combustion of fossil fuels causes oxygen to decrease in the atmosphere/ocean system. As does deforestation, exponential population growth and phytoplankton loss in the oceans from warming stratification limiting nutrients at the surface. It is often said that the oxygen in every second breath you take is produced by photo plankton, that are the true lungs of the planet. I discuss the extend of the oxygen decrease, which is more than you want to know.
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