Matthew Kahn is a Provost Professor of Economics at the University of Southern California, a research associate at the National Bureau of Economic Research, and a research fellow at IZA. On this edition of This is DesignIntelligence, he joins Dave to talk about intentional vs. accidental environmentalists, the power of incentives, and the chicken and egg issue of how the economy influences the climate change challenge and how the climate change challenge influences the economy.