Ключевые слова: architecture, blue, building, cement, chimney, city, cloud, commercial, concrete, dirt, electricity, energy, environment, factory, factory paper mill, farm, gas, gravel, house building, increase, industrial, industries, industry, landscape, loading, machinery, manufacture, mixer, outdoor, outside, pipes, plans, plants, pollution, power, produce, production, quarries, refinery, shearing, silo, sky, smoke, soda, station, steam, tower, towering, website, work,