I know that a greenhouse is not air tight so I imagine it breathes somewhat and exchanges gas with the outside. However, I also assume that it's going to use up the co2 in it for plant growth. How does it not run out? I think you could vent it, but then wouldn't that cool it off and thus defeat the purpose of a greenhouse? All my web searches either give climate change facts or co2 supplementation by farmers.

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[–] 2 points 11 months ago (2 children)

I can't tell if you're joking or not. Unless a home is small, effectively airtight, filled with people, and the doors and windows are never opened, oxygen concentrations aren't going to fall enough to be impactful.

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  • [–] 4 points 11 months ago

    CO2 levels can get too high on new construction, but that's a 600-1000 ppm increase.

    Elevation will have a much larger effect on your body's O2 availability compared to what humans can deplete.

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