Thanks for posting that caww.
The CO2 concentration is 4/100ths of one percent.
If the atmosphere was $100 dollars, CO2 would be 4 cents.
It the atmosphere were 10,000 pennies ($100) on a table, four of them would be CO2.
Now take those four pennies and form a layer among the others to prevent the passage of heat. (and that was just two dimensional)
That’s not even a “drop in the bucket.”