In the United States, the California Zephyr travels between Chicago and San Francisco, and during the 3-day trip, passengers can enjoy amazing views of the Rocky Mountains. For example, the Trans-Siberian Railway in Russia is the longest railway in the world, covering 9,259 kilometers and 10 time zones. Some long-distance passenger trains have become famous. In the 20th century, steam engines were gradually replaced with trains fueled by diesel or electricity.ī. Of course, large amounts of water were also needed. Steam locomotives were fueled by burning coal, wood or oil, to produce steam in a boiler, which drove the engine. Today the technology seems ordinary, but two hundred years ago it was revolutionary. The invention of the steam locomotive made a breakthrough in the development of the railway system in the 19th century.
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