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chemical, construction, dioxide, distillery, energy, engineer, engineering, environment, equipment, factory, factory worker, fuel, fuel storage, fuel tanks, gas, gas industry, gas refinery, global warming, hard hat, industrial, industrial plant, industrial worker, industry, mechanic, metal, oil, oil refinery, oil worker, petrochemical, pipelines, pipes, plant, plant worker, pollution, power, pump, refinery, steel, technology, toxic, toxic substance, worker,