To ground this in the scientific, contrail cloud formation from commercial airliners at high altitudes is actually a significant contributor to global warming.
The chem-trail conspiracy is just humanity’s need to find clear patterns where none exist. We can see the contrails, and we can see all the changes resulting from climate change. They don’t equate into a neat cause and effect. (no offense intented to upstate)
There are many human activities polluting the earth and destabilizing the climate, air travel is just one of them.
Fortunately / unfortunately, cannabis thrives in even the most heavily contaminated soil and air, but it has an incredible capacity to absorb and metabolize all of these toxins. Especially heavy metals, which is why legalized states require heavy metal testing to approve product for sale.