"AI Overview
As of late 2025, there are
no active lawsuits filed by U.S. states against the federal government specifically to stop existing geoengineering programs, as these technologies are still largely in theoretical and research phases, not widespread deployment.
However, there is significant legislative and legal activity around the broader topic of climate intervention and "chemtrails" conspiracy theories:

State-level Bans: Several states have introduced legislation aimed at banning geoengineering or "weather modification" activities, often driven by the baseless "chemtrails" conspiracy theory. Tennessee was the first state to enact such a ban into law in April 2024, followed by Florida in July 2025. Lawmakers in states like Kentucky, Minnesota, New Hampshire, Pennsylvania, and Rhode Island have also introduced similar bills.
No Federal Programs to Sue Over: U.S. scientific agencies, such as the National Oceanic and Atmospheric Administration (NOAA) and the Environmental Protection Agency (EPA), publicly state that no solar geoengineering experiments are currently being conducted in the U.S., and aircraft vapor trails are normal condensation, not chemical sprays.
Cloud Seeding Regulation: Cloud seeding, a form of weather modification to increase precipitation, is a known activity and is currently regulated by the Weather Modification Reporting Act of 1971, which requires reporting to NOAA. It is used in several western states, but there are no lawsuits seeking to stop it entirely."