I like to ask what is the #1 greenouse gas?
Why do they put co2 generators in greenhouses?
technically there are 3, if you mean "worst" by number 1, it would be NO2 if you believe the mainstream science on the subject
n02 being the worst for the ozone, then methane, then c02
but primarily n02 and methane could be dealt with by having slightly hotter combustion zones and firing that residual that gets out into the atmosphere
co2 gens in green houses are there because it's easier to deal with then airflow, what i mean is in a giant "dome" those plants will chew up the co2 rather quickly, and if you are not filtering in fresh air you can get co2 shortages on some of the plants...basically...imagine putting a paper bag over your mouth and nose and breathing it, sure some fresh air will slowly get in, but not enough for you to not feel some sort of restriction in your breathing.
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