Ключевые слова: backgrounds, bronze colored, business finance and industry, chemical, chemistry, chimney, contamination, danger, development, dirty, dusk, economy, environment, equipment, factory, fuel and power generation, fumes, gas, greenhouse, in silhouette, industry, manufacturing, material, no people, outdoors, petrochemical plant, plant, plastic, pollution, power supply, production line, pvc, recycling, refinery, science, sky, social issues, steam, sunset, technology, tower, wire,