Chemtrails won't clog up a planes engine nor are they going to make visibility impossible.
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i mean its a complete waste of time reading that stuff if you have difficulty with a simply poised question, i'll try again:
when the ashcloud was active, airplanes were grounded for days on end, meaning that we werent getting our RDA of chemtrails, my question is, how come the population of europe didnt go into remission??