It's more scientifically based than that. I don't really understand it
Don't let that stop you acting smug and disagreeing though.
But I saw it on a science program
Oh, you saw it on TV, why not do some reading then?
Plenty of sources explaining the flaws in the theory, (both its validity and discussing how the predicted effects are overblown).
It may be true, but it is not a proven theory as much as Co2 causing some warming is.