An amount similar to levels before human impact. | Hacker News

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		turndown on Feb 4, 2019 \| parent \| context \| favorite \| on: Rising CO2 won't make trees grow more, study sugge... An amount similar to levels before human impact.

m0zg on Feb 5, 2019 | [–]

There have been times "before human impact" when atmospheric CO2 was _way_ higher than it is now, though. You'll have to be more specific.

averros on Feb 5, 2019 | [–]

Non sequitur.

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