Date:   7/24/2008 11:40:15 AM ( 17 y ago)
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URL:   https://www.curezone.org/forums/fm.asp?i=1222209

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I'm sorry but this is all incorrect. Throughout history contrails have not necessarily "quickly vanished" given the temperature and humidity of that layer of air. Have a look:


http://contrailscience.com/thirty-contrails-forty-years-ago/

Quite simply, the only thing that has changed are size of the engine, engine efficiency (thicker contrail due to more vapor), and the amount of traffic.

http://contrailscience.com/persisting-and-spreading-contrails/

VOR
 

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