John Nissen, Robert Tulip, Doug Grandt, and Robin Collins belong to webinar groups studying Stratospheric Aerosol Injection (SAI) as a way of cooling the planet by the same means as volcanoes do. Greg Evans is an expert on aerosols at U of Toronto. We discuss the pros and cons of attempting such a project at full scale. For the video, audio podcast, transcript and comments: https://tosavetheworld.ca/episode-603-imitating-volcanoes.