According to Wikipedia (whoever writes that crap), and other CONSPIRACY THEORIST NON-BELIEVERS, the whole CHEMTRAIL thing is just a bunch of hogwash that has no solid proof of fact(s).
So for those of you who still disbelieve, I urge you to watch the video below. If NASA can't convince you, you're probably one of those people who thinks they're living in heaven instead of a systematic HELL ON EARTH. I.e., A brick wall doesn't give a damn.
IMAGE SOURCES:
Chemtrails: (Globalresearch.ca)
Chemtrail Conspiracy Theory (Wikipedia)
NASA Video (Youtube/Published by: Latest Technology)