As an Earth Scientist, I am here to tell you that there is no known cause and effect between the concentrations of CO2, or CO in the atmosphere and the temperature change in the atmosphere.
The average concentrations of atmospheric CO2 are usually < 400 parts/million, or < 0.04 PERCENT. This extremely tiny amount of CO2 is the primary source for ALL of the Carbon for ALL of the life on Earth.
Thus, CO2 is an essential, environmentally FRIENDLY gas in low concentrations.
CH4 also supplies carbon to all life, and also has no known cause and effect on temperature change in the atmosphere, in low concentrations.
BTW, the greenhouse gas that has the largest atmospheric concentration, has been proven to have a VERY large effect on the the temperature of air, sea and land.
Many humans, throughout history, have met horrible deaths when exposed to high concentrations of the effects of this gas.
This gas is ubiquitous, as every square millimeter on the Earth has been exposed to it for millions of years.
It has be proven to also be essential for all known life on Earth.
The present concentration of this giant of green house gasses, is presently 2.5 % of the Earth’s atmosphere.
IOW, it is two orders of magnitude greater in atmospheric concentration than CO2. It is 25, 000 parts per million vs CO2’s < 400 parts per million.
Fortunately, no fear-mongering politician has yet to win an Oscar, or a Nobel Prize for trying to reduce the atmospheric concentration of this always problematic, but essential greenhouse gas.
Final clue: Santa Claus speaks the chemical formula of this gas in his famous laugh.
That nasty, deadly Dihydrogen Monoxide?