This significant book investigates the political economy of environmental policy in Europe with a careful analysis of how EU directives are realised in the member states. The authors explore this issue through a comparative evaluation of the implementation of three pieces of EU environmental legislation in France, Germany, the Netherlands and the UK. Areas covered by the legislation include air emission standards for waste incinerators, the electricity supply industry, and the certification of environmental management systems. The results vary across cases even though overcompliance is observed in certain cases. The regularity arising from the different case studies is related to the determinants of the environmental outcomes that are observed. When environmental directives are implemented they are likely to interact with parallel policy processes and these interactions can exert a strong positive or negative influence on the success of the policy in question. The central policy problem is the fact that these interactions are very difficult to anticipate at the policy formulation stage. It leads the authors to propose that effective environmental policy should therefore be adaptable in order to cope with these unanticipated effects. This book covers a very important and topical issue by studying the genuine impact of environmental directives and increasing the readers' understanding of the way in which environmental federalism works in Europe. It will be welcomed by scholars of environmental law and political science, environmental economists, and environmental policymakers, advisors and consultants.