I think it's unbelievable that in these discussions that some refer to carbon in the atmosphere when it is a black solid stuff and there is none.
Now CO2. That's better. There is supposed to be 400 ppm CO2s in the atmosphere. Fine, so far so good, But that means there is 999600 ppm that is not CO2
I like to tell people that don't know this stuff to compare it to one meter in length and it comes out at 0.4mm. less than the thickness of my thumb nail. Another version is the proportion of time in a year to pass. CO2 part passes in 3.5 hours. Then there is the version to tell the US citizens. A 1 million dollar stack of 100 dollar bills comes to 40 inches. You take the top 4, $100 and see how thin that is and I'll take the other 9996 bills.
I hope some of this makes sense to some of you, but it's all just to show how minuscule the amount of CO2 is in the atmosphere.