David Martin:

Here’s where you go for an explanation.

If you find that too unsettling, though, you could just fall back on the mainstream media explanation, like https://www.fox21news.com/weather/chemtrails-vs-contrails-an-explanation-that-just-makes-sense/ or https://en.wikipedia.org/wiki/Chemtrail_conspiracy_theory.

One of my correspondents tells me that what I have photographed are not the older, longer-lasting phenomena properly called “chemtrails” but something new, supposedly beneficial to Bill Gates and his agricultural ventures known as “white clouds,” not to be confused with the ones made by God.aa