Ключевые слова: attention, bag, biohazard, biological, clean, crisis, danger, ecological, ecologist, ecology, environment, environmental, environmentalist, field, forbidden, garbage, global, grass, harmful, hazard, male, man, nature, outdoors, outside, person, picking up, plastic, pollution, problem, protective, radiation, radioactive, risk, scientist, sign, signal, sky, suit, symbol, threat, toxic, trash, triangle, up, volunteer, warning, waste, yellow, zone,