Ключевые слова: basin, box, cap, catch, cesspool, circle, clean, concrete, construction, dirty, drain, ecology, environment, environmental, factory, filter, flow, food, grass, grease, green, ground, hole, home, house, industrial, industry, old, outdoors, over, park, pattern, pipe, plant, recycle, round, sanitation, sewage, sewer, shape, square, stainless, steel, store, system, trap, treatment, waste, wastewater, water,