Gondring, you have your head firmly planted where the sun don’t shine. CO2 as you say is essential and natural. so how can it be a pollutant also? CO2 comprises less than 4% of the atmosphere, which is low by historical standards. more CO2 equals more luxuriant plant life. we need more, not less CO2 for better crop yields. you combine soot with CO2, as if they were the same. CO2 is colorless, and odorless. Geez!!
See post 91. CO2 is not low by “historical standards”. The concentration now exceeds any concentration measured during the glacial-interglacial periods of the Pleistocene, by almost 100 ppm. Going further back in time for climate comparison requires addressing other factors in the Earth’s climate that are different than the modern era, such as ocean circulation and continental location.