Interesting side note, the two chemicals in chemtrails, Barium and Aluminum, are Ba and Al on the periodic chart. It spells the name of Baal, the child-sacrificing false God of ancient Biblical times...
Yeah...my sister and I had a few discussions about chem trails. I personally have not seen the science with my own eyes, from a source I deem credible. So, I call them contrails. There is also supposedly some strontium in there too.