This FAQ is designed to help state legislators understand the basic terms, history, risks, and policy questions surrounding atmospheric modification, including public concerns about “chemtrails,” ordinary aircraft contrails, cloud seeding, traditional weather modification, and geoengineering. State lawmakers have a responsibility to respond to constituent concerns, to understand the programs and regulatory frameworks already in place within their states, and to evaluate whether additional oversight or clarification is warranted. Because activities in the atmosphere can affect air quality, water systems, ecosystems, and public trust, clear information and transparent governance are essential.

This resource is intended to provide a factual foundation about a growing and complex issue to support informed decision-making, public confidence, and responsible stewardship of shared environmental resources. It is split into five overarching sections with thematically linked questions. Sources are provided for each section at the end of the document.

Read the full FAQ here.

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