WY HB0012

Prohibits intentional release of atmospheric contaminants in Wyoming airspace for purposes of altering climate, weather, or solar radiation, including solar radiation management, stratospheric aerosol injection, and weather modification (excluding cloud seeding)

Defines prohibited substances as sulfates, smart dust, PFAS, genetically modified particles, chaff, and radioactive materials; exempts standard aviation exhaust, agricultural emissions, fire suppression, and cloud seeding

Establishes felony penalties: first offense up to 2 years imprisonment and $100,000-$500,000 fine; subsequent offenses up to 5 years and minimum $500,000 fine, with each day of violation constituting a separate offense

Directs Department of Environmental Quality to monitor aircraft, drones, balloons, rockets, and space-based platforms for prohibited dispersal activities, and authorizes director to petition courts for cease and desist orders

Appropriates $500,000 from general fund and authorizes 2 full-time positions at DEQ for implementation during July 2026-June 2028 biennium