Whether or not it's manmade is the controversial aspect of global warming. I, along with many in the meteorological scientific community do not believe for one second that man has the slightest ability to effect climactic changes of the planet.

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)