stop! please stop calling them chem trails THEY ARE WATER VAPOUR TRAILS AND THAT’S ALL THEY ARE. Does anyone remember the meteor that came in over russia in 2014? all the films of it show the large trail of vapour it leaves in it’s wake. i’m surprised SOME IDIOT out there hasn’t said that it left a chem trail yet! airliners are not leaving chem trails. just stop this ridiculous rumour.