Learned in college that earth’s vegetation is not reaching it’s photosynthesis potential because there is not enough carbon dioxide.
“As the carbon dioxide concentration increases so does the rate of photosynthesis. There is no photosynthesis at very low levels of carbon dioxide and at high levels the rate reaches a plateau.”
http://www.ibguides.com/biology/notes/photosynthesis
Pretty weird how these clowns have forgotten (or never comprehended) simple science from back when they were mere children. Now they’re merely useful(useless) didiots.
That’s why many commercial greenhouses elevate CO2 levels, to around 1000 ppm IIRC. Plenty of folks sell systems for this.