“The ‘greenhouse effect’ is dominated by the absorption spectrum of H2O with a little help from CO2. At current concentrations of both gases, it is inconceivable that further increases in concentrations will lead to any significant warming. Increasing CO2 concentration to 3000ppm [up from about 410ppm today] and doubling the mean H2O level to 2% would result in a global temperature increase of 3.4K [degrees Kelvin, or 3.4 degrees centigrade]. … In short, there is no climate emergency, at least due to ‘greenhouse gases’.” …
“These results are totally at odds with the IPCC version of climate sensitivity ranging between1.5 and 5 degC and suggest quite clearly that CO2 is not, repeat not, a significant driver of global warming and climate change.” ~ David Coe. Physicist.
An excellent summary by Ken Haapala of the science papers at this link.