Ключевые слова: animal, background, color, concept, contaminate, danger, dangerous, day, dead, deadly, death, decay, dirty, disaster, ecological, ecology, ecosystem, environment, environmental, eye, fish, fly, food, global, grungy, hand, lake, life, marine, nature, outdoor, outside, poison, polluted, pollution, pond, problem, river, rotten, sad, sea, smell, toxic, warming, warning, waste, water, white, wild, wildlife,