Ключевые слова: aerial, architecture, bacterium, biology, biomass, building, circle, cleaning, construction, dirty, efficiency, environment, excremental, facility, factory, float, garbage, grass, green, healthcare, healthy, industry, nature, outdoors, overflow, plant, processing, purification, purified, purity, reclaimation, recycle, recycling, reduce, removal, scenic, sewage, sludge, smell, steel, tank, technique, treatment, tree, unhygienic, unpleasant, wastewater, water,