30 Sep '16, 10am

Earth's oxygen levels are declining - and scientists aren't sure why

Earth's oxygen levels are declining - and scientists aren't sure why

A second hypothesis is that over the last 56 million years, Earth has generally experienced global cooling, which has cooled the oceans. Colder oceans can hold more dissolved gases, including dissolved oxygen. Writing for Forbes, geologist Trevor Nace compared the phenomenon to the amount of carbonation in a soda. When soda goes flat it gets warmer, as dissolved carbon dioxide escapes. Colder soda contains that carbon dioxide, and perhaps the cool oceans are now holding more dissolved oxygen in a similar manner.

Full article: http://inhabitat.com/earths-oxygen-levels-are-declining-a...

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