This book is for a broad audience of practitioners, policymakers, scholars, and anyone interested in scenarios, simulations, and disaster planning. Readers are led through several different planning scenarios that have been developed over several years under the auspices of the US Department of Energy, the US Air Force, and continued work at GlobalInt LLC. These scenarios present different security challenges and their potential cascading impacts on global systems - from the melting of glaciers in the Andes, to hurricanes in New York and Hawaii, and on to hybrid disasters, cyberoperations and geoengineering. The book provides a concise and up-to-date overview of the 'lessons learned', with a focus on innovative solutions to the world's pressing energy and environmental security challenges.