Their stupidity is even worse than you realize since most of the warm forcing of CO2 was set in stone a
BILLION years ago which has been above 200 ppm about 99% of the time ever since thus negligible additional warm forcing shows up here is the chart that is self-explanatory:
View attachment 941543
LINK to a recently published science paper.
Since it has been over 180+ ppm for several 100 million years there has been little change in warm forcing input ever since as most of it was already generated in the first 100 ppm with quick decline afterwards which was done about a BILLION years ago thus CO2 warm forcing effects is negligible over 200 ppm levels.
And the Holocene doesn't support their delusions either:
View attachment 941548
NO CO2/temperature change relationship at all.
LINK
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It was rising since around 1700
long before CO2 started rising which begun in the 1880's thus the warming trend went on for around 185 years while CO2 didn't go up which was simply a recovery from the LIA phase.
AGW conjecture is a self defeating SCAM!