Precaution Means Non-Use: A Response to UNEP’s Working Paper on Solar Radiation Modification

On 12 May 2026, the United Nations Environment Programme (UNEP) released a working paper presented as a synthesis of the current state of scientific knowledge on solar radiation modification (SRM). Its headline finding is unequivocal: SRM is not “a viable climate response” (key finding 1). The paper is clear and candid about the severe limitations […]