The bill establishes a new section in Iowa law that prohibits the intentional emission of air contaminants for the purpose of weather engineering. Specifically, it bans the emission, injection, release, or dispersion of any chemical or substance into the atmosphere aimed at altering temperature, weather, climate, or sunlight intensity, unless such actions are already regulated by existing state or federal laws. Violators of this provision will face serious penalties, including classification as a class D felony, with corporations also subject to civil penalties of up to $100,000. Each day of violation is considered a separate offense.

However, the bill includes an exemption for the aerial application of agricultural inputs such as fertilizers and pesticides, as long as these substances are applied by licensed professionals and are not intended to affect weather or climate. This ensures that legitimate agricultural practices are not hindered by the new regulations while still addressing the potential environmental risks associated with weather engineering activities.