The diminishing influence of increasing Carbon Dioxide on temperature. This is not well publicised and not acknowledged in the IPCC. It has a rapid logarithmic diminution effect and is well understood within the climate science community. CO2 at 400 ppm has already reached about ~87+% of its potential warming effect in the atmosphere. A doubling of CO2 to 800 ppm will raise the climate temperature by 0.2 - 1.9C degree depending on information source. Assume 1C for an average. For 1C degree more, CO2 will need to increase to 1600 ppm according to the logarithmic diminution effect.
CO2 appears to be increasing at 2.5 ppm per annum. 400 ppm / 2.5 ppm per annum = 160 years So 160 years for the climate to increase by 1C degree.
Claims of a jump of 2.5C degrees and a climate crisis the near future appear a bit exaggerated.
Who is it that defines what the average temperature of Earth is supposed to be? What is that temperature?
An illustration to give an idea of how little CO2 is in the atmosphere use a 1 meter length = 1000mm. CO2 is 0.4mm of that, equivalent to less that the thickness of your thumb nail against 1000mm.
Meanwhile the increase in CO2 is contributing an increase of food production by better plant growth and drought resistance. There are CO2 generators available for industrial green house food growers to increase the amount of CO2 to 1000 - 1200 ppm in the air to improve growth by approx. 30%. Machines run on propane or other fossil fuels to help feed us.