Your inquiring mind is a blessing to MN's site. You have asked and answered more questions than most others here. Some subjects end in discussion on other topics of great interest.! I've been studying chemtrails for about 10 years.. have lived from the the Canadian border, Northport, Wa. to south of Mexico City, Mexico. Will have to say that wherever I went I saw Chemtrails creating cloud cover. My daughter live in Phoenix, Az. and they are not exempt.
I now live in western Washington state Silver Creek, Wa. Your right the cloud cover at times is lower than the chemtrails that are laid down, sprayed above 30,000 ft. and you can't see them. This very cloud cover may have been created by chemtails to start with.(weather control)
Read more about this at educate-yourself,org
Thanks for all your input