In the face of stalled global efforts to reduce greenhouse gas emissions, alternative technologies and inventions once dismissed as purely fantastical are now receiving serious consideration by the U.S. government. The proposals are numerous and often odd, and Professor of Science, Technology, and Society James Fleming has seen all kinds. “There is a crazy new one in my email every week,” he said. “There are a lot of Rube Goldbergs out there, and some Dr. Strangeloves.”