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प्रश्न
Many ______ are responsible for causing ______ pollution. Petroleum ______ are a major source of ______ pollutants like ______ and ______.
(sulphur dioxide, refineries, industries, nitrogen dioxide, gaseous, liquid, people, air)
उत्तर
Many industries are responsible for causing air pollution. Petroleum refineries are a major source of gaseous pollutants like sulphur dioxide and nitrogen dioxide.
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