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3 States Have Banned Weather Modification

Tennessee, Florida, and Louisiana have enacted laws banning or restricting geoengineering and weather modification activities within their borders. These laws represent a growing movement of state-level action on atmospheric transparency — driven by citizen demand for accountability over what is being released into the air they breathe.

Tennessee

Enacted

Bill

SB 2691 / HB 2063

Signed

April 2024

Effective

July 1, 2024

Penalty

Class C misdemeanor, up to $10,000/day

First state in the nation to ban geoengineering. Prohibits the intentional injection, release, or dispersal of chemicals, chemical compounds, substances, or apparatus into the atmosphere with the express purpose of affecting temperature, weather, or the intensity of sunlight.

Source: Tennessee Legislature — SB 2691

Florida

Enacted

Bill

SB 56

Signed

June 20, 2025

Effective

July 1, 2025

Penalty

Third-degree felony — up to 5 years in prison, up to $100,000 fine

First state to criminalize weather modification as a felony. Prohibits any person from conducting weather modification or climate engineering operations in the state. Requires airports to report any suspected weather modification activity. Establishes a public complaint system for citizens to report violations. Governor DeSantis signed it into law calling it protection for Floridians from chemical experimentation.

Source: Florida Senate — SB 56

Louisiana

Enacted

Bill

Act No. 95

Signed

2025

Effective

August 1, 2025

Penalty

Up to $200,000 per violation

Bans weather modification activities and requires reporting of suspected operations. The Louisiana Department of Environmental Quality established a public reporting portal where citizens can file reports of suspected weather modification activity. Over 400 citizen reports were filed in the first months after enactment.

Source: Louisiana DEQ — Act No. 95 Reporting Portal

Note on Montana

Montana's SB 473 passed the state Senate in March 2025 but was killed on the House floor on April 10, 2025 by a vote of 45-55. It is not currently enacted.

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