Ключевые слова: above, aerial, air, bacterium, biology, bird, circle, cleaning, construction, dirty, down, drone, ecology, england, environment, europe, facility, factory, farm, flight, flow, fly, garbage, green, industrial, industry, land, plane, plant, poland, processing, purification, purified, purity, recycle, recycling, reduce, river, road, sewage, sludge, smell, tank, treatment, tree, urban, view, waste, water, works,