House Joint Memorial No. 18 expresses the concerns of the Idaho Legislature regarding solar geoengineering activities being conducted without public knowledge or consent. The Memorial highlights the distinction between solar geoengineering, which has potential global effects, and local weather modification practices. It emphasizes the need for oversight in Idaho's airspace, as current activities may pose unknown risks to public health, agriculture, and ecosystems. The Memorial calls for the empowerment of the Idaho Department of Environmental Quality to investigate and halt unauthorized atmospheric contamination.

The Idaho Legislature urges Congress to pass legislation that would prohibit the intentional release of substances for solar geoengineering without state approval, ban the use of unmarked aircraft for such activities, and classify unauthorized acts as felonies with significant penalties. Additionally, it encourages collaboration between federal and state law enforcement to enforce these measures and formally rejects any federal or foreign-sponsored solar geoengineering programs conducted over Idaho without transparency and consent. The Memorial also calls on elected officials and candidates to support legislation that protects Idaho's airspace and public health.