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Experiments that explore ways to influence precipitation.
The claim that everyday aircraft contrails are actually deliberate “” used to modify weather or spray populations is widely rejected by scientists and government agencies, which identify the phenomeno...
States approach with a patchwork of regimes: some actively run or permit programs with formal permitting, reporting and oversight (e.g., , , ), while others have moved to restrict or ban and broader (...
is actively practiced in at least nine states — , , , , , , , and — and is largely implemented and funded at local or state levels rather than by a unified federal program . Oversight is a patchwork o...
Cloud seeding is an established, decades‑old technique that can nudge precipitation under certain conditions but is not a proven tool for creating large‑scale extreme weather on demand; its effectiven...
State legislatures in multiple have responded to public concern about “” by drafting or passing bills that ban or track , restrict , or require agencies to collect reports — moves lawmakers say protec...
Federal law today creates a reporting-and-tracking regime for weather modification but stops short of a comprehensive federal licensing or permitting system: must be notified of planned activities and...
The claim that specific “chemicals” are being secretly sprayed from high‑altitude aircraft has no substantiated evidence in the scientific literature or government reviews; mainstream agencies conclud...
High-altitude white streaks seen are, according to atmospheric scientists and federal agencies, ordinary aircraft contrails—ice crystals formed from jet exhaust under certain humidity and temperature ...
The United States has had and continues to have technologies that can modify weather at local to regional scales—most notably cloud seeding, a practice dating to the 1940s and used in the U.S. for dec...
Peer‑reviewed and government-reviewed studies generally find that can increase precipitation but the magnitude is highly variable—most rigorous reviews put typical enhancements in the 0–20% range whil...
—an American cloud‑seeding campaign during the War—produced documented short‑term hydrological changes (increased rainfall and extended wet periods) intended to bog down enemy logistics, but authorita...
No credible evidence supports the long-running “chemtrails” claim that governments or secret actors are systematically spraying toxic chemicals from high-flying aircraft over the public; independent s...
States with long‑running programs have carried out periodic —sampling precipitation, surface water, soils, sediments and, in some cases, biological assays—and the bulk of that monitoring has found sil...
State-level bans on vary widely in scope and wording: some narrowly target “” or while others use broad phrases — like prohibiting acts that “affect temperature, weather, climate, or the intensity of ...
Three states—, and —maintain active statutory or regulatory systems that issue permits and set explicit application requirements, while federal law requires reporting of weather‑modification activitie...
The preponderance of credible scientific and government sources finds no evidence that routine aircraft contrails are part of a secret, organized program to spray chemicals on the public . Claims that...
Local governments and state legislatures across the United States have responded to renewed public fears about “chemtrails” primarily by drafting and advancing statutes that ban intentional atmospheri...
States are moving to ban geoengineering largely because of perceived environmental and health risks, a surge in public alarm fed by conspiracy narratives, and gaps in federal governance that leave leg...