contrail fly Air-Pollution luxury insinerator class smogliners non-stop global contrail-cirrus smogblanket service 8km up "going all the way" to a very different world. There are 25,000 flights in the US daily and it takes just six jets to cover 7700 square miles of sky with contrails.Dr. David Travis: Associate Dean of Assessment, Geography Professor University of Wisconsin Whitewater http://asd-www.larc.nasa.gov/SCOOL/contrails.html http://oea.larc.nasa.gov/news_rels/2004/04-140.html http://deoxy.org/meme/AviationSmog http://www.contrails.nl/