As Louisiana Rep. Kimberly Landry Coates stood before her colleagues in the state’s Legislature she warned that the bill she was presenting might “seem strange” or even crazy.

Some lawmakers laughed with disbelief and others listened intently, as Coates described situations that are often noted in discussions of “chemtrails” — a decades-old conspiracy theory that posits the white lines left behind by aircraft in the sky are releasing chemicals for any number of reasons, some of them nefarious. As she urged lawmakers to ban the unsubstantiated practice, she told skeptics to “start looking up” at the sky.

“I’m really worried about what is going on above us and what is happening, and we as Louisiana citizens did not give anyone the right to do this above us,” the Republican said.