1 The began in England in the 18th century . Lots of factories opened with new machines . 2 in the 1850s were very difficult . They were unhealthy and wages were low .
3 James Watt invented the in the 1760s . Then engineers used it to in factories .
4 The grew quickly in the 19th century because steamboats and trains needed coal to make steam .
5 The things factories produced gave people a better
6 Before the 18th century , people didn't work with machines . They worked
7 In 1850 , many people lived in cities in poor ,
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1 The began in England in the 18th century . Lots of factories opened with new machines . 2 in the 1...
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