A prominent voice in the Make America Healthy Again movement is pushing for health secretary and anti-vaccine activist Robert F. Kennedy Jr. to make the topic of chemtrail conspiracy theories a federal priority, according to a report by KFF News.

KFF obtained a memo, written by MAHA influencer Gray Delany in July, presenting the topic to Calley Means, a White House health advisor. The memo lays out a series of unsubstantiated and far-fetched claims that academic researchers and federal agencies are secretively spreading toxic substances from airplanes, poisoning Americans and spurring large-scale weather events, such as the devastating flooding in Texas last summer.

“It is unconscionable that anyone should be allowed to spray known neurotoxins and environmental toxins over our nation’s citizens, their land, food and water supplies,” Delany writes in the memo.

Daniel Swain, a climate scientist at the University of California, Los Angeles, told KFF that the memo presents claims that are false and, in some cases, physically impossible. “That is a pretty shocking memo,” he said. “It doesn’t get more tinfoil hat. They really believe toxins are being sprayed.”

Delany ends the memo with recommendations for federal agencies: form a joint task force to address this alleged geoengineering, host a roundtable on the topic, include the topic in the MAHA commission report, and publicly address the health and environmental harms.

It remains unclear if Kennedy, Means, or federal agencies are following up Delany’s suggestions. Department of Health and Human Services spokesperson Emily Hilliard told KFF that “HHS does not comment on future or potential policy decisions and task forces.”

However, one opportunity has already been missed: The MAHA Commission released its “Make Our Children Healthy Again” report on September 9, along with a strategy document. Neither document mentions any of the topics raised in Delany’s memo.