Ключевые слова: abstract, algae, background, biohazard, biological, bubble, canal, chemical, city, contamination, damage, danger, deep, desolate, dirty, disaster, ecological, ecology, environment, environmental, factory, fatal, filthy, flowing, foam, froth, garbage, human, industrial, industry, infection, lake, life, liquid, nature, pollution, pond, problem, refinery, river, scum, sewage, stream, substance, surface, texture, toxic, unhygienic, waste, water,