What are the other chemicals (besides barium) found in chemtrails?

By paranominal
Published: June 9, 2009
What are the other chemicals (besides barium) found in chemtrails?  | read this item

chemtrail are said to be harmful chemicals in the air to weaken humans immune system.
They look like contrails which are the heat of a air jet engine passing through the air, it will condense the water vapor and you will see a contrail…
BUT these are not contrail clouds according to theories and real events.
the question [...]