A bill to amend the Clean Air Act to clarify standards for emissions emanating from outside of the United States, and for other purposes.

This bill would modify the Clean Air Act, the primary federal law governing air quality in the United States. Specifically, it seeks to clarify the standards and rules that apply to air emissions that originate from outside U.S. borders but may affect air quality within the country. This could address questions about how the Environmental Protection Agency regulates transboundary pollution—such as air pollution that crosses from Canada, Mexico, or other countries into the United States.

If enacted, this bill could affect how the federal government monitors, regulates, and responds to foreign sources of air pollution. The practical impact on citizens would depend on the specific clarifications made, potentially influencing air quality standards in border regions and how the U.S. coordinates with other nations on pollution control. The bill is currently in the early stages of the legislative process, having been introduced in the Senate in February 2026 and referred to committee for consideration.