Ключевые слова: abstract, background, backgrounds, black, burn, burning, chemistry, color image, colorado, construction industry, danger, dark, denver, environmental conservation, exploding, factory, fire, flame, gas, hand, ideas, industrial equipment, industry, laboratory, light, lighter, manufacturing, metal, metalwork, multi colored, no people, production line, refinery, science, smoke, social issues, sparks, technology, usa, welding,