Ключевые слова: aeroplane, air, air pollution, air polution, boat, bulk, cargo, cargo plane, carrier, chimney, danger, departure, dirty, ecology, elpis, environment, exhaust, export, flight, freight, fuel, gas, gasoline, heavy, hydrocarbon, industry, influence, medical, netherlands, ocean, oxide, piraeus, plane, polluted, pollution, polution, problem, safe, sea, ship, shipping, smoke, tire, transport, transportation, vehicle, vessel, water, wheel, world,