Why long chimneys are built in factories
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Factories have long chimneys a they have a special device called as electrostatic precipitator installed inside the chimneys. Electrostatic precipitator act as emission control units which trap dust particles, shoot particles from the gases that are ready to be released out of the chimneys.
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Answer:
Long chimneys take the harmful smoke and gases produced in the factories high up in the air so as to reduce its harmful effects on the ground.
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