Since the atmosphere is somewhat difficult to directly heat one might conclude that ground
temperature would play some role in said heating. Since we've put so much effort into pollution]
control devices (cars, lawnmowers, power plants, weed eaters) it might be that we've added to the
ground heating by producing such clean air. I know in the sixties it was very difficult in LA with
all the smog to even get a sunburn, such is no longer the case. The pollution controls are working
and they've caused global warming!!