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Old 10th Aug 2018, 15:52
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climber314
 
Join Date: Jun 2014
Location: Chocolatetown
Age: 59
Posts: 83
Interesting read about the post 9/11 effect. I am suspicious of the Penn State study given the following at the bottom of the linked article:
"The National Science Foundation supported this work."

I think they have an agenda.

"A Penn State study compared regions of the United States where contrails tended to form more strongly with areas where they didn’t. The more contrail-heavy the area, the less the variation between daytime highs and nighttime lows tended to be."
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