Pick the odd one out from the following. Hint - Controlling air pollution.

Silencers

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Scrubbers

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Fabric filters

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Electrostatic precipitators

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Solution

The correct option is A Silencers
Silencers control noise pollution while others control air pollution. To control the particulate matter in air, we need to deploy smoke stacks with electrostatic precipitators. Fabric filters, scrubbers, and inertial separators should be fitted in the factories. Oil and gas can be used as alternatives to coal to reduce smoke in some of the industries. Noise pollution can be curbed by fitting silencers to generators.

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