Re: Surprised?
"It takes all of two seconds to google "how does co2 trap heat,""
But the important question is not how but how much. CO2 is responsible for a tiny proportion of the greenhouse effect. The absorption spectrum of CO2 is narrow, once you have absorbed all the heat in that narrow part of the spectrum higher CO2 proportions will make no difference.
All the predictions of catastrophic temperature increases assume small rises from CO2 force much larger rises from increased water vapour which is all guesswork and frankly bollocks. The global climate system can not possibly have an overall +ve feedback effect. If it did a single dinosaur fart would have us burnt to a crisp by now.