General (General discussion, talk about anything.)
Peter P: It is big business and it is a nonsense. I don't know where they are coming from. The percentage of CO2 in the atmosphere is about 420 ppm, i.e. about 0.04%. 100 years ago (1921) for every 10,000 molecules in the air 3 were CO2, now it is about 4.
And they are saying thay causes climate change!!
CO2 is a weak greenhouse gas absorbing infra-red in 2 narrow ranges. Water vapour absorbs over a much wider range and, on average, it is about 3%, i.e. about 60 times the concentration of CO2.
In my day we used to call it "Earth Sciences", they don't seem to have that anymore.
Replied: 15th Oct 2021 at 12:28