Ключевые слова: above, aerial, aerial shot, bacterium, biology, biomass, circle, clean, cleaning, conservation, construction, dirty, drone, ecology, ecosystem, environment, environmental, facility, factory, filtration, garbage, green, industrial, industry, liquid, plant, pollution, process, purification, purified, purity, recycle, recycling, reduce, round, sewage, sewage farm, sewer, sludge, storage, system, tank, technology, top, treatment, urban, view, waste, wastewater, water,