Ключевые слова: air, atmosphere, black, blue, boat, business, carbon, cargo, chemical, chimney, climate, cruise, danger, diesel, dioxide, dirty, ecology, emission, energy, engine, environment, exhaust, ferry, fuel, gas, global, industrial, industry, metal, nature, ocean, pipe, pollute, pollution, power, sea, ship, sky, smog, smoke, steam, summer, toxic, transport, transportation, travel, tube, vehicle, vessel, warming,