Ключевые слова: architecture, background, blue, breath, bright, building, chimney, clean, cloud, construction, contamination, danger, design, emission, energy, environment, equipment, exterior, factory, gas, industrial, industry, limit, line, metal, modern, outside, pipe, plant, pollution, power, round, shiny, silver, sky, smoke, smokestack, smokestacks, stack, stainless, steel, technology, toxic, tube, waste, white,