Not just Covid. In an office environment or a school, you need to be under 1000ppm: Effects of low-level inhalation exposure to carbon dioxide in indoor enviro

Not just Covid. In an office environment or a school, you need to be under 1000ppm: Effects of low-level inhalation exposure to carbon dioxide in indoor environments: A short review on human health and psychomotor performance https://www.sciencedirect.com/science/article/pii/S0160412018312807 https://www.sciencedirect.com/science/article/pii/S016041201...