[bolobaby]

Seems to me like evidence of GLOBAL WARMING that occurred well before the internal combustion engine broke onto the scene!

[PSYCHO-FREEP]

Well, there were internal combustion engines then, we call them Volcanoes and tropical forests today.

In essence, the opposite effect occurs from atmospheric particulate, which contributes to a cooling of the Earth. Tropical forests pump more natural methane and nitrogen into the air than the human race ever could. Their elimination is a good thing if "Greenpeace house gasses" were truly a fact.