Ключевые слова: analyze, below view, biohazard, biological, catastrophe, chemical, concept, danger, death, destruction, dig, digging, disaster, ecologist, ecology, environment, expertise, exploring, gas mask, global crisis, ground, hazard zone, infection, nature, nuclear, one person, outdoors, overalls, people, person, pit, planting, pollution, problem, professional, protection, reforestation, research, researcher, respirator, rubbish, safety, scientist, shovel, soil, threat, toxic, unrecognizable, volunteer,