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18 elementary students, teacher fall ill after dry ice experiment in Tennessee classroom
(www.usatoday.com)
this post was submitted on 17 Feb 2024
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Reminds me of the video on how to build a cheap AC for camper with dry ice :D
BTW the rising CO2 concentration of the atmosphere is already affecting cognitive ability especially in classrooms. We'll need CO2 scubbers in closed rooms soon.
While elevated CO2 levels seem to be affecting certain cognitive abilities, I did not find definitive results indicating that this has become a general problem.
There is a meta review that indicates additional research might be worthwhile / required ( https://pubmed.ncbi.nlm.nih.gov/32557862/ ).
Do you have any sources worth looking into?
Sorry I don't have good sources. I just read this a few years back with one study showing there is already an effect.
While you'd probably need to study this further to be 100% certain, I don't think it's much of a stretch to assume ventilation is going to work worse because a constant air exchange would move concentrations towards 400ppm instead of 280ppm. So the median (or whatever) can be higher than 100ppm difference. Or maybe I'm getting this wrong?
Ventilation definitely helps. I mean, I'm not doubting the effects, I actually run sensors in my office and have personally experienced "mind fog" when I ignored the readings for too long and didn't open the windows when it was time.
I was just wondering if we're already at a point where environmental changes have made this one additional problem we need to think about more.
I think we have to assume it's already affecting people. The sensors are a good idea, I definitely should get some for arduino.
they have these really cool plants that can do that for you...
here's some: https://www.geeksforgeeks.org/best-oxygen-producing-indoor-plants/
but if co₂ concentration is already affecting cognitive abilities, why is my blood o₂ concentration just fine?
Ah thanks I've been meaning to look into plants, how much you'd need to make an impact. Unfortunately the article doesn't mention numbers, like how much CO2 one human produces in a normal or in a well insulated sealed room, and how much of that plants can scrub, and how much light they need.
Another way to think about this would in terms of calories, if plants where to produce 100% calories / edible sugar or starches, it should somewhat match how much CO2 we output. To grow enough potatoes for your daily calories you need about 250m². You probably need less and that would be for a perfectly sealed room.
I don't know about blood concentration, but if it's fine then presumably it isn't affecting cognitive abilities yet. It might also vary from human to human how well they can oxygenate / expel Co2.
i couldn't find it quickly, but there was a factory foreman or owner in china who did a bunch of research on the best plants to clean his factory air, and put them everywhere... supposedly it worked, but they had to dust the leaves regularly... they had broad leaves though...
in beijing maybe?
i'll look again but it seems doable...
in the article it does say it's output depends on a lot of conditions.
(also i have no idea how reputable that site is)
No worries, I'll have to research this stuff later. My ideal / current dream would be something like all the walls of a house (or catamaran) are about 80cm deep greenhouses with aquaculture crops that produce strawberries or similar supplemental crops.