The textbook contains information about the discipline "ecology" as an extensive science - megaecology (global ecology), which is divided into dozens of environmental sciences, including the ecology of animal husbandry. Basic concepts about the biosphere, its structure, biogeocenosis as a basic unit of study of ecology are given Serious attention is paid to changing the state of natural and artificial biogeocenoses in the conditions of increasing anthropogenic pressure. Characteristics of sources and causes of pollution of the environment, raw materials and food products. Based on this, measures are outlined to ensure the production of environmentally friendly agricultural products and their quality control. The training manual is intended for students of agricultural universities studying in the direction of training 35. 03. 07 "Technology of production and processing of agricultural products", and can also be used for training directions 36. 03. 02 Zootechnics and 36. 05. 01 "Veterinary Medicine" .