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The trails in the sky (not calling them chem trails heh) are actually trapping heat. They work/are like clouds and in places like hubs or around airports might be frequent enough to increase the...

^ or at least they are spelling out messages in the sky for them that can only be read from space, a bit like the Nazca Lines.

Airplanes fly certain routes, so even if your town doesn't have an airport there can be traffic way up in the sky. And aluminum is one of the most common elements in nature. It is used as fuel in...