evidence: "BREAKING: Texas could become the first state to outlaw ‘chemtrails’ with a new petition that is collecting signatures to ask state representatives to pass laws banning dangerous atmospheric aerosol spraying," read the text of a screenshot in a Dec. 18 Facebook post. [...] We’ve debunked several claims about "chemtrails," a conspiracy theory that claims that the condensation trails behind aircraft are part of a secret, large-scale program to poison the atmosphere with toxic chemicals. The U.S. Air Force and scientists say chemtrails are not real. [...] The article links to a petition by Clean Texas Skies, a group asking state legislators to pass legislation to prohibit "aerosolized spraying" without testing and approval from public representatives. The petition did not use the word "chemtrails" but used other language from the chemtrails conspiracy theory, saying that the trails behind airplanes are part of a covert U.S. military operation. Some chemtrails theories posit the spraying means to reduce people’s life expectancy or sterilize them, control people’s minds or control the weather.