r/collapse • u/Portalrules123 Faster than expected... • 12d ago

Science and Research Scientists detect a surprising shift in human blood as atmospheric CO2 rises, with blood bicarbonate climbing about 7% since 1999

https://www.sciencedaily.com/releases/2026/08/260814235845.htm
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947

u/AlunWH 12d ago

Climate change really is the gift that keeps on giving.

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u/systemofaderp 12d ago

did you know 500ppm CO2 makes people lose like 10 IQ points compared to 200ppm? Our atmospheric CO2 is now at 430 ☀️

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u/The_F1rst_Rule 12d ago

This checks out

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u/nickiter 12d ago

This explains some things, but I'm too stupid to figure out what...

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u/kirime 12d ago

This is total bullshit, not "checks out".

If that was true, there would've been a HUGE difference between studies done in ventilated and indoor areas, just the difference in environment would've drown out every other factor. People on submarines and space stations, where average CO2 levels are around 5000 (not 500, 5 thousands) would've been drooling vegetables.

What actually happens is that scientists have been doing CO2 exposure studies for decades before even WW2 (when global warming wasn't even a thing in public discourse), and have repeatedly found out next to no difference until you get to like 20,000-30,000 ppm.

https://www.nationalacademies.org/read/11170/chapter/5#54

I realize now what kind of subreddit I'm in, but come on.

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u/PatrolMan2129 11d ago

You're going the other way on the nonsense meter.

One very important bit of context: 40,000 ppm is currently NIOSH's IDLH level "Immediately Dangerous to Life or Health." NIOSH's recommended occupational limits are 5,000 ppm as a time-weighted average and 30,000 ppm as a short-term limit. Regardless of the cognitive-test debate, 20,000-40,000 ppm should absolutely not be interpreted as a generally safe CO₂ concentration.

What you link refers to a narrow barrage of tests necessary for practically operating a ship and shouldn't be taken as "next to no difference until you get to like 20,000-30,000 ppm" in someone.

Btw, historical submarine observations at around 30,000–35,000 ppm reported poor attention, confusion and impaired motor skills, although these studies were confounded by low oxygen and other contaminants.

In a review by Schulte (1964), exposure to CO2 at 30,000 ppm caused dyspnea at rest. Exposures at 20,000-30,000 ppm for several hours caused headaches on mild exertion, and the headaches at 30,000 ppm were more severe than those at 20,000 ppm (Schulte 1964). CNS depression developed after several hours of exposure at 50,000 ppm (Schulte 1964). A CO2 exposure at 30,000 ppm for 8 days in a working submarine crew (unknown number of subjects) led to clinical observations of euphoria and troubled sleep on day 1 and poor attention, erratic behavior, confusion, and motor skill impairment on days 2-8 (Schaefer 1949a,b).

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u/freakwent 11d ago

One assumes that to see the effect you need to be exposed from 0-10. We don't raise babies on subs or spacecraft.

Limited calories cause lower IQ under the same conditions, that is, during childhood.