<p>Disclaimer: I am not a scientist.</p>
<p>I was wondering if there is a concern that the world will run out of breathable atmospheric oxygen as the number of dead zones in the ocean increases with global warming. This concern is based on the understanding that 60% (give or take) of our breathable oxygen is produced by phytoplankton. I have read a few peer reviewed articles to that effect, all by the same author, but haven't seen any articles that counter that concern.</p>

<climate-change><oceanography><oxygen><geobiology>
As the number of ocean dead zones increases, is the world's primary source of atmospheric oxygen (phytoplankton) at risk?
user21456
# As the number of ocean dead zones increases, is the world's primary source of atmospheric oxygen (phytoplankton) at risk?

(Asked by: username_0 on 2021-04-24)

Disclaimer: I am not a scientist.

I was wondering if there is a concern that the world will run out of breathable atmospheric oxygen as the number of dead zones in the ocean increases with global warming. This concern is based on the understanding that 60% (give or take) of our breathable oxygen is produced by phytoplankton. I have read a few peer reviewed articles to that effect, all by the same author, but haven't seen any articles that counter that concern.

**Tags:** climate-change, oceanography, oxygen, geobiology


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