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Message Subject New Chemtrail Poll: Do you believe in Chemtrails?
Poster Handle George B
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Earth Warmed by Trails of Clouds that Jets Leave Behind

by Wynne Parry, LiveScience Senior Writer

Date: 29 March 2011 Time: 05:01 PM ET

[link to www.livescience.com]

Over the span of a few hours or more, the contrail loses its definition and becomes a wispy cirrus cloud. But if the atmosphere is very moist, the line shape can exist for days, said Ulrike Burkhardt, a researcher at the Institute for Atmospheric Physics at the German Aerospace Center. She and colleague Bernd Kärcher calculated contrails' effect on climate.

"Assuming a steady growth of air traffic, then contrails would remain for some time the most important aviation-related warming. If, on the other hand, aviation volume is decreasing, then carbon dioxide would become more important relative to contrail cirrus," Burkhardt wrote in an email to LiveScience.
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