Despite the fact that environmental policy has become increasingly important in Ontario politics since the end of the Second World War, very little scholarship has been devoted to exploring either the development of that policy or the pivotal relationship between the environment and the province’s wider political economy. In Blue-Green Province, Mark Winfield provides the first comprehensive study of environmental policy in Ontario. A recognized authority in the field, Winfield masterfully explains the formulation and implementation of environmental policy in Canada’s most populous province, tracing its development through the Progressive Conservative dynasty that ruled Ontario politics from the mid-1940s to the mid-1980s, to the dramatically different governments of Premiers Peterson, Rae, Harris, Eves, and McGuinty. He offers particularly trenchant coverage of the little-studied period following the Harris’s Common Sense Revolution, examining the implications of the 1999, 2003, and 2007 elections and their subsequent governments for Ontario’s environment and politics. Blue-Green Province is a timely, original analysis of one of the most crucial issues in Ontario politics today. It will be welcomed by students, scholars, and practitioners of environmental policy, political science, economics, history, as well as anyone with an interest in Ontario’s environmental and economic future. With the provinces playing increasingly dominant roles in Canadian environmental policy, it will be compelling reading for those following the interplay of environmental policy, politics and economic development across Canada as well.