What Are Airplane Chemtrails, Really?

Some think the trails behind planes have mind-altering chemicals, but do they really? Here’s the difference between chemtrails & contrails.

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Contrail Science
http://science-edu.larc.nasa.gov/contrail-edu/science.php
“Contrails are clouds formed when water vapor condenses and freezes around small particles (aerosols) that exist in aircraft exhaust. Some of that water vapor comes from the air around the plane; and, some is added by the exhaust of the aircraft.”

Instant Freeze Supercooled Water
http://www.coolscience.org/CoolScience/Teachers/Activities/SCWater.htm
“You may have seen videos of specially prepared supercooled liquid water freezing instantly when shaken or tapped, like ours below. But can you reproduce this demonstration at home? …We’ll show you a simple and almost fool-proof way to prepare supercooled water and impress your friends, while also experimenting with another interesting property of water.”

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