’Global mechanisms for climate governance have not attained significant international cooperation towards curbing emissions, increasing the likelihood of severe impacts from climate change worldwide. This book provides a fresh look at operational and innovative subnational agreements that have proved to achieve cooperation across regions, inspiring a new style of negotiations capable of effective results in the face of climate change.’ MarÃa Eugenia Ibarrarán, Universidad Iberoamericana Puebla, Mexico ’One of the great questions regarding climate change governance in North America - but also elsewhere - is how to achieve a scaling up of multiple and diverse mitigation initiatives, to provide more coordinated and effective policy results. Marcela López-Vallejo locates the seeds of such coordination at the subnational level in the kind of transregional linkages exemplified by RGGI and WCI. What is unique about this analysis is her multi-layered conception of region, one which involves a nesting of governance and policy linkages, social construction and physical connection, as well as economic and energy associations that operate across scales. Through a thorough analysis of these two experiments, López-Vallejo shows us what factors are critical to create the kind of linkages necessary for more synchronized and successful climate change governance - and these lessons are applicable far beyond North America.’ Debora L. VanNijnatten, Wilfrid Laurier University, Canada