Cloud seeding isn't new and it isn't a secret. It also isn't happening all over the place. It's an experimental process for increasing rainfall in areas where drought is negatively impacting crop harvests. It also doesn't generate the contrails that chemtrail conspiracy theorists insist are really the government spraying chemicals into the population. You're conflating two completely things.
Discussion
You do realize there are many examples of the government directly spraying the populace, right?
https://www.smithsonianmag.com/smart-news/1950-us-released-bioweapon-san-francisco-180955819/
I can list many others. It’s not a stretch of the imagination to suggest further malice, such as chemtrails.
Just stop. You're doing what every conspiracy theorist does. You're starting with your preferred reality, and fishing for nuggets of unrelated truth to disingenuously support the conspiracy theory. The fact that the government did something that partially reflects aspects of your conspiracy theory back in the 50s does not mean there is a mass government program involving thousands of planes on a daily basis going back decades to unendingly spray the population with "chemicals".