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प्रश्न
When air is contaminated by ______ substances which have a ______ effect on both the ______ and ______ it is referred to as______.
(air pollution, harmful, living, unwanted, non-living, pollutants)
उत्तर
When air is contaminated by unwanted substances which have a harmful effect on both the living and non-living, it is referred to as pollution.
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