Ключевые слова: background, city, civilization, cleaning, clouds, construction, contamination, dirty, disposal, district, dump, ecological, ecology, emission, environment, environmental, environmental disaster, forest, garbage, grass, green, heap, highrise houses, house, industrial, junk, landfill, metal, mountain, muddy, nature, new buildings, old, outdoors, overcast, pile, poison, pollution, problems, rainy clouds, recycle, recycling, rubbish, scrap, sky, sky crying, stack, trash, waste, yard,