It would be interesting to have a list of the major sources of CO2. Volcanos, etc. I thought man-made CO2 is about 0.28% of the atmosphere.
That said, without CO2, we have no plants, then we all die.
Looking at goog, CO2 varies from 0.28% to as high as 0.41% of the atmosphere depending on the reference quoted.
0.28% is what I remember from college back in the previous millennium.
That is total CO2 for the atmosphere.
Depending on the source, manmade CO2 is about 10% of the total - about 0.03% of atmospheric CO2.
Now if we can Air Liquide and other bulk gas handlers to kick up their production a bit, all would be solved.
But then what would the greens have to cry about?
One of the problems with putting it out is that methane is a much more potent greenhouse gas than CO2.
There is going to be a lot of methane released before that thing is brought under control. Which might never happen.
Almost better to just let it burn.
Some estimates guess that human activity is responsible for 2% of that.