Ключевые слова: blue, boat, chimney, emission, energy, engine, environment, environmental, exhaust, funnel, industrial, industry, marine, nautical, pipe, pollution, power, ship, shipping, sint nicolaas, sinterklaas, sky, smoke, smokestack, steam, steamboat, steamer, steamship, sweets, tradition, traditional, traditional culture, transport, transportation, travel, vessel, winter, zwarte piet,