Discuss the Revolution made in the means of transport and communication in the latter half of the 18th and in the 19 century.
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The technological changes included the following: (1) the use of new basic materials, chiefly iron and steel, (2) the use of new energy sources, including both fuels and motive power, such as coal, the steam engine, electricity, petroleum, and the internal-combustion engine, (3) the invention of new machines
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