It seems to me, though, that we have so *little* carbon in our atmosphere (CO2 is 400 ppm, which is only 0.04% --- compared to O2, which is 21% or thereabouts.) It's hard for me to see how that little carbon dioxide effectively keeps enough plant biomass alive to keep up our rather astounding oxygen levels.
Does that make sense?
Yes, photosynthesis is one of the wonders of this earth. And most of it isn’t even happening where it is obvious to the land dweller’s eye. Most of it’s happening in the oceans, those bodies of brine that not only don’t challenge what lives in them, they support it vibrantly.
(I wasn’t picking on you by the way. I was picking on the self-evolutionism ideas.)