>>>Incidentally, I saw a telly docu some months back showing how air pollution is reflecting some of the sun's rays and ameliorating the effects of global warming, and that the cleaner our air gets the more GW will take effect - a double whammy. Aircraft con-trails are one of the conributary factors. The skies over New York were clear of traffic for a few days after 9/11 and the temps recorded at NY rose by several degrees.
>>>
>>>We're all doomed!
>>
>>I heard about that contrail study and it sounds like weird science to me. A bit like getting cancer from eating barbeque. I remember hearing about a study when I was in college, where someone proved that dime coins cause cancer as well.
>
>Personally, this is my favorite study of all time.
>http://www.newscientist.com/article.ns?id=dn7915

Excellent Jake, thanks. Good article!