All of you are right, maybe.
Notropis, you are right when you say there is no simple answer. I was just stating the facts that there are a lot more gasses in our atmoshpere because of human activity and the physical changes inof light that cause it to act the way it does.

In the big picture, the earth is currently at teh apex of a warming trend and looking at a cooling in temperatures in the future. But as far as the human time frame is concerned, IMO, we are going to be looking at increaed temperatures in the forseeably future.
gotta
Muskeg Man, sometimes, you gotta cut down the trees to make 'em grow.