Global Catastrophic Risks 2017 Global Catastrophic Risks 2017 Global Catastrophic Risks 2017 Editor Julien Leyre, Global Challenges Foundation. Global Catastrophic Risks 2017 Previous slide Next slide Global Catastrophic Risks 2017 Global Catastrophic Risks 2017 Editor Julien Leyre, Global Challenges Foundation. Global Catastrophic Risks 2017