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A comment on Ask HN: How do we fight the existential threat of climate change?. Parent comment

Re:Ask HN: How do we fight the existential threat of climate... by autisticmind on Sunday July 07, 2019 @01:28PM (#20376307)
More than 350 ppm is not a condition we had, as life as we know it was formed and took place. Now we are over 410ppm.
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