H.R. 4403 (119th)Bill Overview

Clear Skies Act

Environmental Protection|Environmental Protection
Cosponsors
Support
Republican
Introduced
Jul 15, 2025
Discussions
Bill Text
Current stageCommittee

Referred to the House Committee on Energy and Commerce.

Introduced
Committee
Floor
President
Law
Congressional Activities
01 · The brief

The Clear Skies Act would make it a federal crime and subject to civil penalties for anyone to knowingly perform "weather modification" within U.S. jurisdiction.

The bill defines weather modification broadly to include injection, release, emission, or dispersal of chemicals or substances (and delivery of apparatus) into the atmosphere for the purpose of altering atmospheric composition, weather, climate, temperature, or sunlight intensity, with explicit examples such as geoengineering, cloud seeding, solar radiation management, and aerosol releases.

The Environmental Protection Agency (EPA), coordinating with FAA and NOAA, must establish a public reporting system, investigate reported incidents it deems worthy of review, and refer confirmed violations to the Department of Justice; EPA and FAA may also impose civil penalties.

Passage15/100

Based solely on the bill's text, the Clear Skies Act is a sweeping prohibition that would upend existing federal authorizations, impose criminal penalties, and inhibit a range of scientific and operational activities. Those features typically provoke resistance from agencies, technical communities, and members of Congress across the ideological spectrum; the bill contains few built-in compromise mechanisms and would likely face procedural obstacles in the Senate, so the content profile suggests a low probability of enactment.

CredibilityMisaligned

Relative to its intended legislative type, this bill is a clear and direct substantive policy change that criminalizes and civilly penalizes a defined set of atmospheric modification activities and purports to repeal authorizations for such activities, while adding an administrative reporting and investigation role for EPA (with FAA/NOAA coordination).

Contention60/100

Scope and definition: Liberals emphasize risks to climate research and adaptation projects; conservatives want to eliminate federal geoengineering programs but worry about increased EPA enforcement.

02 · What it does

Who stands to gain, and who may push back.

Who this appears to help vs burden50% / 50%
Federal agenciesLocal governments · Permitting process
Likely helped
  • Federal agenciesReduces the risk of deliberate or large-scale atmospheric interventions that could have unintended environmental or pub…
  • Targeted stakeholdersCreates a public reporting and investigatory framework (EPA-led, with FAA/NOAA coordination) that supporters could cite…
  • Federal agenciesLimits potential use of weather modification for hostile, covert, or militarized purposes by establishing criminal pena…
Likely burdened
  • Targeted stakeholdersCurtails or criminalizes scientific research and development into deliberate climate interventions and some atmospheric…
  • Local governmentsDisrupts state, local, and private uses of weather-modification services (for drought relief, wildfire mitigation, agri…
  • Permitting processCreates new enforcement, investigation, and judicial costs (EPA, FAA, NOAA, DOJ) and risks criminal liability for actor…
03 · Why people split

Why the argument around this bill splits.

Scope and definition: Liberals emphasize risks to climate research and adaptation projects; conservatives want to eliminate federal geoengineering programs but worry about increased EPA enforcement.
Progressive35%

A mainstream progressive would be sympathetic to preventing unchecked or harmful geoengineering and unregulated atmospheric manipulation, but would be concerned that the bill’s broad, immediate ban and repeal clauses would unintentionally bar or criminalize legitimate climate-research, adaptation, and disaster-response activities (including scientific experiments, carbon dioxide removal trials, and locally-authorized cloud seeding).

They would worry the criminal and civil penalties, public posting of reports, and very broad definition of "weather modification" could chill research and international cooperation.

They would likely prefer a more narrowly tailored prohibition with explicit carve-outs for peer-reviewed research and strict oversight rather than an across-the-board repeal of federal authority.

Likely resistant
Centrist50%

A pragmatic moderate would see a legitimate policy aim in preventing unregulated atmospheric engineering while being concerned that the bill’s language is sweeping and could unintentionally disrupt existing, lawful programs and research.

They would be wary of the immediate repeal/nullification of statutes and regulations and of criminal penalties that may be disproportionate or create legal uncertainty.

They would favor clarifying language, targeted narrow prohibitions on specific risky geoengineering techniques, and a structured permit or waiver process for vetted research.

Split reaction
Conservative60%

A mainstream conservative reaction would be mixed.

Some would welcome a ban on government or secretive manipulation of weather (and applaud repeal of federal weather-modification authorities), consistent with skepticism of large-scale centralized interventions.

However, others would object to expanding EPA’s enforcement role (public reporting system, investigations, civil penalties) and to new criminal penalties that increase federal prosecutorial reach.

Split reaction
04 · Can it pass?

The path through Congress.

Introduced

Reached or meaningfully advanced

Committee

Reached or meaningfully advanced

Floor

Still ahead

President

Still ahead

Law

Still ahead

Passage likelihood15/100

Based solely on the bill's text, the Clear Skies Act is a sweeping prohibition that would upend existing federal authorizations, impose criminal penalties, and inhibit a range of scientific and operational activities. Those features typically provoke resistance from agencies, technical communities, and members of Congress across the ideological spectrum; the bill contains few built-in compromise mechanisms and would likely face procedural obstacles in the Senate, so the content profile suggests a low probability of enactment.

Scope and complexity
86%
Scopesweeping
52%
Complexitymedium
Why this could stall
  • The bill text does not include a cost estimate or analysis of administrative burdens, making it difficult to gauge the scale of implementation expenses and enforcement resources required.
  • It is unclear how the repeal/nullification provisions would interact with specific existing statutes, contracts, grants, or state programs—risking legal challenges and complex implementation questions.
05 · Recent votes

Recent votes on the bill.

No vote history yet

The bill has not accumulated any surfaced votes yet.

06 · Go deeper

Go deeper than the headline read.

Included on this page

Scope and definition: Liberals emphasize risks to climate research and adaptation projects; conservatives want to eliminate federal geoengi…

Based solely on the bill's text, the Clear Skies Act is a sweeping prohibition that would upend existing federal authorizations, impose cri…

Unlocked analysis

Relative to its intended legislative type, this bill is a clear and direct substantive policy change that criminalizes and civilly penalizes a defined set of atmospheric modification activities and purports to repeal au…

Go beyond the headline summary with full stakeholder mapping, legislative design analysis, passage barriers, and lens-by-lens tradeoff breakdowns.

Perspective breakdownsPassage barriersLegislative design reviewStakeholder impact map
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