Sulfur dioxide ( $S O_{2}$ ) may be reduced in air, if _____.

Catalytic converters are used in cars

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Car pools are used

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Filters or scrubbers are used in chimneys

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Ozone friendly products are introduced

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Solution

The correct option is C Filters or scrubbers are used in chimneys
Sulphur dioxide is one of the many pollutants that pose threat to the environment. Sulphur dioxide when gets mixed up with rain water forms sulphuric acid resulting in acid rain. This sulphur dioxide can be reduced by using filters or scrubbers in chimneys.

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