this post was submitted on 20 Dec 2023
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Science Memes

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submitted 10 months ago* (last edited 10 months ago) by [email protected] to c/[email protected]
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Disclaimer: This is a joke. Ecofascism is obviously bad, kids. Don't be that guy.

https://theconversation.com/8-billion-people-why-trying-to-control-the-population-is-often-futile-and-harmful-194369

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[–] [email protected] 6 points 10 months ago (2 children)

Are we concerned about the amount of oxygen available now?

[–] [email protected] 6 points 10 months ago (1 children)

Well it did cause the first and largest mass extinction event so far......

[–] [email protected] 1 points 10 months ago (2 children)

Sure but anthropogenic climate change is an issue of greenhouse gas accumulation rather than a lack of oxygen, no? Rather than there being too many people literally just using too much oxygen.

[–] [email protected] 3 points 10 months ago

CO^2 production consumes oxygen from the atmosphere; Carbon capture that doesn't make oxygen will leave that issue alive and well.

[–] [email protected] 1 points 10 months ago

I was joking. We wouldn't be alive if that particular extinction even hadn't happened.

[–] [email protected] 2 points 10 months ago (1 children)

Photosynthesis by ocean-dwelling cyanobacteria produces around 1/3rd of oxygen IIRC. CO2 causes ocean acidification which reduces their ability to grow, thus limiting O2 production. When it is hotter, plants ability to store carbon and photosynthesise goes down. So not right now, but O2 will be cause for concern in the future if we don't turn away from fossil fuels.

[–] [email protected] 2 points 10 months ago

Thanks, I'd never really considered the impacts climate change would have on oxygen. I looked into this a bit and it seems to also be the case that rising ocean temperatures also reduce the capacity of the water to hold dissolved oxygen, which causes a nasty feedback loop.

So while there's not an immediate risk of atmospheric oxygen concentration dropping by any significant amount, there is a real concern of oxygen concentrations in the oceans dropping pretty drastically. This then accelerates climate change even further and could have longer term effects on atmospheric levels as well.