The monograph is devoted to problems related to ammonia ingress into atmospheric air. Characteristics of ammonia properties, approaches to normalization and estimation of emissions are given. An assessment of ammonia emissions in Belarus from the main categories of sources was carried out, a series of emission maps was given. The levels of ammonia in the atmospheric air of the cities of Belarus compared to the cities of Europe are characterized. The results of studies of ammonia content in atmospheric air in the impact zones of livestock complexes are given. Measures to reduce ammonia emissions from major sources, primarily in agriculture, approaches to their regulation are described, a forecast of ammonia emissions for various scenarios of the country's economic development is presented. Designed for specialists in the field of nature management and environmental protection, university students, everyone interested in environmental problems.