Quote:
Originally Posted by sammyg2
But here's something interesting, volcanos also dump massive amounts of sulfur dioxide and other gasses into the atmosphere, which COOL the planet.
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You may be on to something. The absence of contrails resulting from aircraft not flying after 9/11/2001 meant slightly higher recorded temperatures world wide.
Contrails - Crystalinks
It's just water vapor folks, ignore the link - chosen at random for nice photo.