Integrating environmental policies into the policies of all other sectors is the core European environmental policy. But there has been no thorough investigation of the political process involved. This volume provides the first. It analyses the process of policy integration - the greening of public policy - across the relevant sectors and countries. It finds significant variation from sector to sector and from country to country, and analyses the reasons for this. (Surprisingly the UK, traditionally the 'dirty man' of Europe is far more actively engaged than environmental 'progressives' such as Germany.) It identifies the obstacles to integration and offers solutions for policy formulation, decision making and implementation at the relevant political levels.