Ключевые слова: bacterium, bad, bog, bubble, bubbles, chemicals, chemistry, danger, destroy, destruction, dirty, disaster, disease, drainage, dump, ecology, environment, environmental, factory, fatal, floating, flow, flowing, foam, froth, garbage, harmful, industrial, industry, liquid, messy, mud, nature, ocean, pollution, pond, recycling, risk, scum, sea, sewage, soap, stagnant, surface, toxic, trash, unclean, unhygienic, unpleasant, waste, water, white,