The book "The Impact of Nitrogen Deposition on Natural and Semi-Natural Ecosystems" offers a comprehensive analysis of the interactions between nitrogen emissions, their deposition, and the effects on natural and semi-natural ecosystems. It brings together contributions from internationally recognized scientists who address various aspects of nitrogen deposition. The individual chapters discuss relevant factors and processes associated with nitrogen deposits, including their impacts on soils, non-forest vegetation communities, forest ecosystems, and surface waters. A central theme of the book is the assessment of these impacts in relation to the establishment of critical loads. It is aimed at researchers, advanced students, and policymakers dealing with the effects of air pollution.