OP is joking. It's a joke about the absurdity of it.

As if all the airlines or even some of them would be adding Aluminum to the fuel tanks and in any sufficient quantity to do anything.

Aluminum, third on the list of most abundant elements, comprises roughly 8% of the Earth’s crust, and is actually the most abundant metal in the crust.

Compare that to the history of leaded gasoline... Chemtrails is a joke, a psyop, just like covid.

If you really believe in Chemtrails: I'd look into "Project Highwater" and the sun-earth electromagnetic connection for a more plausible explanation to what your seeing in the sky on an irregular basis.