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A comment on Researchers reached the bottom of ice sheet at -2670M after 7 years of drilling. Parent comment

Re:Researchers reached the bottom of ice sheet at -2670M aft... by nonethewiser on Monday July 31, 2023 @03:17PM (#36947474)
“Natural concentration” is not the right way to look at it because there are higher concentrations that predate the industrial revolution and humans. The all time high (that we know of) is from about 350,000 years ago. This was by all means natural and pre industrial revolution.
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Re:Researchers reached the bottom of ice sheet at -2670M aft... by adhesive_wombat on Monday July 31, 2023 @03:35PM (#36947661)
"The only known natural concentration empirically compatible with long-term human civilisation"
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Re:Researchers reached the bottom of ice sheet at -2670M aft... by gottorf on Monday July 31, 2023 @04:55PM (#36948671)
> empirically compatible with long-term human civilisation

Empirically observed, atmospheric CO2 went from ~320ppm to ~410ppm from 1970 to 2020[0], during which period the human population more than doubled from ~3.7B to ~7.8B and yet deaths caused by climate dropped threefold[1] (not 1/3 the rate; 1/3 in absolute number).

[0]: https://www.climate.gov/news-features/understanding-climate/...

[1]: https://library.wmo.int/doc_num.php?explnum_id=10989

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Re:Researchers reached the bottom of ice sheet at -2670M aft... by adhesive_wombat on Monday July 31, 2023 @05:55PM (#36949424)
On the scale of human civilisation, 50 years is hardly "long term".

Polonium by that ultra-short-relative-term reckoning is not only harmless as it you still feel fine 10 minutes later, but actually healthsome as you rather feel refreshed by the delicious green tea you just drank in that 5-star hotel bar.

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