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Evening Standard
Evening Standard
World
Nuray Bulbul

What are chemtrails? Conspiracy theory re-emerges online

Americas Australia Europe United Kingdom

Everybody has seen those white streaks that trail after airplanes and contrast with the blue sky to create stripes.

According to science, condensation trails, as the lines are known, are created when water vapour around aeroplane exhaust gases condenses and freezes.

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