Chemtrails are one of the most popular conspiracy theories. Here’s what it means
By Leah Asmelash, CNN (CNN) — We’ve all seen those white streaks trailing behind jets, creating stripes against the blue sky. The lines are called contrails, short for condensation trails, and they appear when water vapor condenses and freezes around the exhaust from an aircraft, according to the University Corporation for Atmospheric Research. At least
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