An experiment any 5 year old can do: Take any plant, and put it under a bell jar filled with pure oxygen.... and see how long it lives... even a pure air mix of 80% nitrogen and 20% oxygen will cause the same result. CO2 is plant food, not a pollutant.
Plants consume C0
2 during photosynthesis. However they also produce CO
2 simultaneously. However their consumption of CO
2 is higher than their production so there is a net reduction in the amount of CO
2. Also, as the concentration of CO
2 increases, the photosynthetic efficiency increases, thus the net result is a decrease in CO
2 concentration.
The largest contributor to Global Warming is Di hydrogen monoxide
(H2O) = water.