chem trails are multi purpose.
To Ionize the sky.
To enhance the Tesla Death Ray (scalar waves)
Which can kill individuals or whole regions and cause earthquakes, tornados, super strong hurricanes (Acapulco) and mind control etc.
To saturate the forests with aluminum so they're extremely flammable (we've seen posted here the military plan to weaponize forest fires).
To control rainfall, create floods and droughts.
And a slew of other top secret and possibly critical national security/defense objectives.
To replace the natural atmosphere (ozone) lost due to a myriad of reasons, some natural, one of which may be the orbit of Nibiru which may have already happened or may be what's coming. (ncswic)