Louisiana Advances Ban on ‘Chemtrails’

State representative claims contrails, the result of hot aircraft engine exhaust, are changing weather patterns.

Zach Vasile

Monday, June 02, 2025 at 03:12 PM ET

Verified

Edited By:

Ryan Ewing

Contrails produced by aircraft. [Credit: Edward Winstead]

Key Takeaways:

Louisiana lawmakers have advanced SB 46, a bill based on the "chemtrail" conspiracy theory, which alleges aircraft are spraying chemicals to alter weather.
The bill aims to ban these "chemtrails," which are scientifically known as harmless condensation trails (contrails) formed by water vapor from jet engines.
SB 46 has passed both the state House and Senate and, if signed into law, would go into effect in August, requiring the collection of citizen complaints about alleged chemtrails.
Despite legislative attempts in various countries, "chemtrail" bans have historically failed due to the lack of scientific evidence supporting the theory.

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Lawmakers in Louisiana have advanced a bill based largely on a conspiracy theory alleging that aircraft are spraying nanochemicals that alter the weather.

SB 46, passed by the state House of Representatives on May 29, would ban “chemtrails,” the white streaks that trail from jets as they fly. The white lines are actually known as condensation trails or contrails, and they are the result of water vapor in hot aircraft engine exhaust hitting low temperatures at high altitudes.