Ключевые слова: air, background, chemical, co2, construction, ecology, energy, environment, environmental, equipment, factory, fuel, gas, gasoline, global, grunge, heavy, industrial, industry, iron, large, machine, manufacturing, metal, natural, night, oil, old, petro, petrochemical, petroleum, pipe, pipeline, pipes, plant, plumbing, pollution, power, processing, production, pump, refinery, rust, rusty, sky, smoke, stack, station, steam, steel, structure, sunny, tank, technology, tower, travel, valve, warming,