this volume presents the results and conclusions of the application project of eurotrac about the state of the troposphere over europe, drawing from the plethora of scientific results. the various findings and recommendations on local, regional and global scales illustrate the complexities of the situation and indicate the subsequent difficulties which face environmental policy makers seeking to find ways to abate pollution on a regional scale. the book is recommended first for the scientific and policy-related information which it contains. in addition, the book is an excellent illustration of how the scientific programme can be evaluated in order to draw conclusions which are useful in policy development.