Hi, I'm new to the forum but I have three questions regarding greenhouse gases.
I know that N2 and H2 cannot become greenhouse gases so they don't do radiating, but I was wondering how they might influence atmospheric radiation, like with collisions, etc??
I learned in chemistry that CO2 has various "bands" at which it absorbs radiation, but only in certain regions that matters (like at wavenumbers of 667 cm-1 ). What determines which regions matter?
I've seen an argument that water vapor is also a powerful greenhouse gas, and my teacher said she didn't know much about this, but the textbook said that water vapor has not increased much, where CO2 has. Any insight on that?
