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Hey DGC ! Make some noise!

This is a question I’ve been pondering over for some time, but have been too lazy to do the proper research,…so; If the stomata are the mechanism by which the plant inhales Co2 and they are solely located on the under side of the leaf, given that Co2 actually “falls”, how can we improve how much Co2 can get to the underside stomata? If we use a fan, aren’t we losing usable Co2, since the plant can only uptake Co2 while the lights are on, meaning our fans/air outtake would come on as well. Simply; How can we improve how much Co2 can get to the underside stomata? Keep fighting the good fight, KCKP.