evidence: The Tennessee state House of Representatives passed a bill Monday designed to prevent geoengineering, the practice of intentionally modifying the atmosphere to counteract global warming. [...] The chemtrails theory is a loose grouping of unfounded ideas that suggest planes are not making trails of condensation known as contrails but instead are spraying government-made chemicals to control people’s behavior or affect their bodies. In recent years, some chemtrails conspiracy theories have evolved, with believers suggesting that contrails are actually aerosols designed to control the weather or the climate. The Tennessee Lookout, a nonprofit news organization, reported that Republican Sen. Steve Southerland, one of the sponsors, referred to the chemtrails theory when he presented his argument for the bill to a reporter.