how many have the sources of energy for light and movement in cities changed over tge last 120 years ?
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Explanation:
About 120 years ago the insides of buildings were lit by
candles, oil lamps and gas lights. Coal and wood were used as fuel
or fires to keep the buildings warm in winters. The streets were
lit by gas lights. Today, the buildings are lit by electricity.
Some buildings have air conditioning powered by electricity to keep
them cool in summer. They also have heaters powered by electricity
to keep them warm in winter. pls mark me brainliest
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