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I may be misunderstanding, but if you claim outside is 415 and that's that, it's wildly inaccurate. Where you live, time of day, lay of land, all matters. Winter (no trees or vegetation with photosynthesis), and there is naturally more local CO2. Live deep in the country, in a forest, in the summer, when trees have loads of water and are at max output? Less CO2. At night, more CO2, for all those trees, that greenery, is breathing and exhaling CO2, with no sun for photosynthesis. It's variable, not static. |