Ключевые слова: animal, bad, channel, chemical, contaminate, danger, dangerous, dark, dead, deadly, death, decay, dirty, disposal, ecology, ecosystem, environment, factory, fish, fishing, float, food, fresh, freshwater, garbage, grass, green, harmful, industry, lake, life, natural, nature, plague, poison, poisoning, polluted, pollution, pond, problem, river, rotten, rustic, sewage, smell, stink, toxic, waste, wastewater, water,