“Many states have environmental impact review statutes analogous to NEPA, which apply to state and local agency actions and approvals. A prominent example is the California Environmental Quality Act (“CEQA”), which would apply should that state or its local jurisdictions adopt a license requirement similar to that in the Rhode Island geoengineering bill.”

“Some U.S. environmental laws may have implications for large-scale geoengineering deployment, but may be less applicable on the research scale. For example, sulfur dioxide is regulated under the Clean Air Act. Indefinitely repeated releases of sulfate aerosols to maintain high atmospheric levels could affect attainment of ambient air quality standards.”  p. 72