Ppl need to spend more time worrying about different issues. I looked up a link or two. If countless airplanes were carrying millions of pounds of aluminum and barium, do you know how much fuel that would consume annually? More than the US has in stock, that is a FACT. And that's just one rebuddle to that odd motion. Notice you NEVER see "Chemtrails" when humidity is high? On warm days? Because condensation is better seen on nice yet cold sunny days. Read a book, an actual book not published by conspiracy-pushing sub groups that just want to start ignorant rumors. Look at flight plans, air planes are everywhere in our skies. Carrying things that do not pour chemicals in our atmosphere. If those levels were seriously of worry, your average Joe could measure it with tools bought at the Sharper Image and the issue would be addressed and gone viral very quickly.