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Chemtrails and Contrails: A Less Secret Sky, but Not Necessarily a More Reassuring One
Some aircraft trails disappear almost immediately. Others persist, spread and sometimes end up veiling part of the sky. What are they really, why do they behave so differently, and are they as harmless as we tend to assume? Using data from my ADS-B station and the available scientific evidence, I have tried to distinguish what we observe, what we imagine and what we can actually establish.