Ключевые слова: aerial, circle, clean, cleaning, construction, dirty, ecology, effluent, environment, environmental, facility, factory, filtration, flow, illustration, industrial, industry, infographic, infrastructure, isometric, liquid, osmosis, plant, pollution, process, processing, purification, purified, purity, recycled, recycling, reservoir, round, sanitary, separation, sewage, sewer, sewerage, sludge, station, storage, system, tank, technology, treatment, urban, waste, water,