[url=http://www.abc.net.au/science/articles/2011/03/30/3177693.htm]Airplanes and CO2 versus contrails[/url]. The contrails turn out to be worse for climate change than CO2.
[url=http://www.abc.net.au/science/articles/2011/03/30/3177693.htm]Airplanes and CO2 versus contrails[/url]. The contrails turn out to be worse for climate change than CO2.