Ключевые слова: air, apocalypse, biohazard, burnt, catastrophe, city, concept, control, danger, dangerous, desert, detecting, disaster, district, ecological, ecology, emergency, emissions, environment, environmental, factory, flower, gamma, gas, gerbera, ground, halloween, industrial, land, man, mask, military, nature, nuclear, person, pollute, pollution, post, problem, protection, radiation, radioactive, respirator, safety, scientist, smog, smoke, soldier, toxic, zone,