Ключевые слова: balance, crude, cycle, danger, dirt, dirty, distillation, ecology, environment, environmental, factory, flow, fuel, hazard, hydrocarbon, industrial, industry, lake, language, leak, liquid, manufacture, nature, ocean, oil, orange, petrol, petroleum, pink, plant, plumbing, polluted, pollution, power, producing, production, progress, protecting, protection, refinery, shift, ship, source, state, technology, toxic, up, water,