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ehh i'm done with this thread i've made my point contrail do have an effect on the weather, that was what i needed to do.
like i said before i know what i personally saw.
so need to find something else to talk about this thread is now dead.
In other words, SMALL AIRCRAFT disperse cloud seeding material into the sky, and then LARGE JETS pass through it, and their condensation vapor (C02 + H2O) bonds with with those materials to form the thick, persistent contrails.