Ключевые слова: black, block, blue, brick, building, chimney, clouds, concept, cone, construct, construction, cover, day, detail, environment, environmental, evergreen, flue, furnace, house, isolated, laying, net, orange, pine, pipe, pollute, pollution, pylon, rock, roof, shadow, sky, smoke, smokestack, soot, structure, sunlight, sunlit, sunny, sweep, sweeper, texture, tiles, top, window,