3 ms·

Oops, today really isn't my day for math apparently :(... 1% did seem high. --- > I'm interested. Well I don't have a blog post ready to go yet, but I can po

by gpm 6y ago

Oops, today really isn't my day for math apparently :(... 1% did seem high. --- > I'm interested. Well I don't have a blog post ready to go yet, but I can point you to some papers now. - This review cites a bunch of papers about health effects in the 1-10k ppm range: https://www.nature.com/articles/s41893-019-0323-1.epdf?referrer_access_token=eE4mU6nzyLJz_7TLn_xNMNRgN0jAjWel9jnR3ZoTv0Nmh56_6v6IG1wyUXiF6sNTHAt-0vDDZqKRyKQg__8_oxrm08uvJsMrDK8PUmvmArkegYALMahVANSDeRSyA8bTgKfjffuaO26tlP3hD6cHFJFm0RG8oSheeD0KC5mI-WlSIvZFjIL2uyZaN9KCm3_Lbdv7vGDkqNLiWzCKvPLh_8frf88zlrpECCEpeNnT6fFdkuk5mdFgJYeS6LPRWtSJ3t0qVO-l-XeqvTlXVLKdJ67nc_EcZbx81TO5U6j_0n-5SVon62qg8lNRw9-x8xkOCiys08VULZjj_p25Brz_0Q%3D%3D&tracking_referrer=www.theguardian.com https://www.nature.com/articles/s41893-019-0323-1.epdf?refer... - Table 3 in this paper references a bunch of papers around 10kppm: https://www.researchgate.net/profile/Susan-Rice-3/publication/228863103_Human_Health_Risk_Assessment_of_CO2_Survivors_of_Acute_High-Level_Exposure_and_Populations_Sensitive_to_Prolonged_Low-Level_Exposure/links/5526bb3b0cf229e6d635bcbf/Human-Health-Risk-Assessment-of-CO2-Survivors-of-Acute-High-Level-Exposure-and-Populations-Sensitive-to-Prolonged-Low-Level-Exposure.pdf https://www.researchgate.net/profile/Susan-Rice-3/publicatio... - These papers show mental effects in the 1-4k ppm range: https://ehp.niehs.nih.gov/doi/full/10.1289/ehp.1104789 https://ehp.niehs.nih.gov/doi/full/10.1289/ehp.1104789 http://www.aretas.ca/sites/default/files/imce_images/Indoor%20Environment%20in%20Schools%20%E2%80%93%20Pupils%20Health%20%26%20Performance%20in%20Regard%20to%20CO2%20Concentrations.pdf http://www.aretas.ca/sites/default/files/imce_images/Indoor%... - These two are from nasa about the ISS - which brings it's own complications but otherwise also show mental effects in the above range https://web.archive.org/web/20190613133240/https://ston.jsc.nasa.gov/collections/trs/_techrep/TP-2012-217358.pdf https://web.archive.org/web/20190613133240/https://ston.jsc.... https://pubmed.ncbi.nlm.nih.gov/24806559/ https://pubmed.ncbi.nlm.nih.gov/24806559/

taxicabjesus 6y ago
Thanks for the links, I have started perusing them. As someone pointed out in a reply to another comment in this thread, oxygen is especially toxic 33 feet below the surface of the water (because of higher pressure), but can have toxic effects at the surface too. I don't grok respiration yet, but my understanding is that altitude/pressure is essential for putting the relative N2/O2/CO2 partial pressures into context.

by gpm 6y ago

taxicabjesus 6y ago

Thanks for the links, I have started perusing them. As someone pointed out in a reply to another comment in this thread, oxygen is especially toxic 33 feet below the surface of the water (because of higher pressure), but can have toxic effects at the surface too. I don't grok respiration yet, but my understanding is that altitude/pressure is essential for putting the relative N2/O2/CO2 partial pressures into context.