Ключевые слова: background, basin, bathe, biology, biomass, blue, care, circle, clean, cleaner, cleaning, cleanse, clear, colours, dirty, dung, factory, forest, garbage, garden, green, home, hose, house, industry, maintenance, pool, processing, purification, purified, purity, ramp, recycling, reduce, reflections, reusing, scraper, season, sewage, slimy, sludge, smell, steel, summer, sunbath, swim, swimming, tank, treatment, unhygienic, unpleasant, vacuum, view, water, work,