Originally Posted by
KiloB
I’m still waiting for someone to create a glass tank with 0.004% CO2 and one with 0.003% CO2 and see how much hotter one gets than the other!
Why do you think that would be good demonstration? If you wanted to compare two duvets you wouldn't measure the temperature of the duvet itself would you? Surely you would want to measure how warm a person under it gets? or the heat loss through the duvet?
You can block most of the IR light emitted by a person using a narrow stream of 100% pure C02. Video demo here..
https://www.pbslearningmedia.org/res.../#.XP_ZK-RwZoI
So what concentration of CO2 is needed in a 16km thick layer of air?