A contrail is a natural water vapor airplane condensation trail. A contrail is also much shorter in length compared to a chemtrail, which is much longer in length. Contrail short length, chemtrail long length. Here you will see them side by side. Next you will see a chemtrail suddenly stop when the chemical spray stops, which shows that chemtrails are real. The third chemtrail behavior you will see, is a chemtrail filmed in fast motion, descend and contaminate the ground.