This book is a distillation of the First Annual International Technical Workshop on Climate Risk held in 2016 in Wells, Maine, USA. It is organized into four major themes, namely: the Montreal Protocol; industry and infrastructure concerns; sustainability and strategic planning; and climate science and informing business risk. The volume's premise is that, long before the 2015 Paris Agreement, many professionals from diverse fields were working to solve the problems of human-caused climate change. The 1987 Montreal Protocol is now in support of a key emission reduction goal of the Agreement. It was time for the seasoned leaders who implement the Protocol, the world's most successful treaty for atmospheric protection, to share their knowledge and wisdom with the next generation before that expertise was lost. The purpose of bringing these communities of practice together is to leverage the many successes to date to inspire future innovations through 'lessons learned'; ensure that new or updated regulations are timely communicated and economically executed; and identify opportunities for related sustainable development.