This report is an important collection of tools used in the framework of the Geneva Convention on Long-Range Transboundary Air Pollution (CLRTAP). Thus, it provides for example a scientific basis on the application of critical levels and loads, their interrelationships, and the consequences for abatement. After the transfer of the Coordination Center for Effects from the Netherlands to Germany this edition is published by the German Environment Agency (UBA). With this edition the existing independent manual chapters were transferred into a new continuous document, which is in line with latest layout and accessibility standards of UBA. Also, a copy-editing of the whole document was done, with technical updates in chapters 4 and 5.2.