House Joint Memorial No. 15 expresses the concerns of the Idaho Legislature regarding geoengineering activities conducted by federal agencies and private entities without public knowledge or consent. The memorial highlights the potential risks associated with these activities, which involve the release of substances like aluminum oxide and sulfur dioxide into the atmosphere, potentially impacting human health, agriculture, and ecosystems. It emphasizes the constitutional duty of the state government to protect public health and state sovereignty, urging the U.S. Congress to pass legislation that would prohibit such geoengineering practices without explicit state approval.

The memorial calls for specific actions, including banning the use of unmarked aircraft and other platforms for geoengineering over Idaho, making unauthorized acts a felony with significant penalties, and promoting collaboration between federal and state enforcement agencies to uphold these regulations. Additionally, it encourages all elected officials and candidates to support legislation that safeguards Idaho's natural environment and asserts state control over its airspace. The memorial concludes with a directive to forward copies to key federal officials and the congressional delegation representing Idaho.