I think you missed a couple of zeros there.
My bad. .00035. Sorry!
0.04% = 0.0004 . just a different way of saying it.
so C02 is less than 0.0004 of the atmosphere.
C02 does not affect the Earth's climate
C02 has been skyrocketing but the Earth is getting colder and has been since 2000
the reason the left picked C02 is because capitalism/industry produce C02