Classification of toxic chemicals by their effects on the human body. Experiments on animals: cats, rabbits, mice on the effects of mustard gas, sarin, hydrocyanic acid, psychological substances on their bodies. Newsreel of the Second World War: inappropriate behavior of people who were exposed to psychochemical substances. Actions by Civil Defense Organizations to Protect Against Chemical Weapons; training the population in protective equipment, issuing gas masks to citizens, providing first aid. Evacuation of the population from the centers of chemical contamination. Action by the population under the threat of a chemical attack. The use of gas masks, overalls, individual first-aid kits. Shelters and their equipment. Treatment points for chemical agents. Elimination of the consequences of chemical weapons. In the lesions, samples of water and soil are taken for research, and delivered to the laboratory.