The two main changes that the Industrial Revolution of the eighteenth and nineteenth centuries featured according to the Britannica Encyclopedia include:
" (1) the use of new basic materials, chiefly iron<span> and </span>steel <span> (2) the use of new energy sources, including both fuels and motive power, such as </span>coal<span>, the </span>steam engine<span>, </span>electricity<span>, </span>petroleum<span>, and the </span><span>internal-combustion engine. "</span>
