Ключевые слова: accidents and disasters, air pollution, biochemical weapon, biochemistry, biohazard, biohazardous, biological hazard, biology, breathing device, chemical, chemistry, contamination, cooperation, crisis, danger, danger zone, decontamination, emergency, environment, epidemic, fire brigade, firefighter, fireman, gas mask, group of people, infectious disease, mask, occupation, people, poisonous, pollution, practice drill, protection, protective suit, protective workwear, radiation, radiation protection suit, radioactive contamination, rescue, rescue worker, risk, team, teamwork, toxic, toxic waste, training, virus, working,