When jets fly through the air they emit an exhaust of vapor water known as a contrail, short for condensation trail. Some people believe that some of the contrails we see are actually chemtrails, or rather, chemical trails emitted from these jets. What is contained in these chemtrails and why they are being emitted is up for debate.

Some believe that these chemtrails have effects on the weather while others believe these chemtrails have dangerous chemicals which are harmful to humans. These people argue that the government is behind many of these chemtrails and that they are secretly emitting these harmful chemicals into the atmosphere.