​ Guest: Joseph A. Olson is retired engineer, impassioned science writer, and respected innovative thinker with over 100 major civil engineering and climate-related articles to his name. He is co-founder and senior fellow at Principia Scientific International. PSI is a self-sustaining community of impartial scientists from around the world deliberating, debating and publishing cutting-edge thinking on a range of issues without a preconceived idea of outcomes. Olson worked with Dr. Tim Ball and other scientists on an important science text debunking the greenhouse gas theory.