In big cities,the major atmospheric pollutant is
- ACarbon monoxide and oxides of sulphur
- BHydrocarbon and hot air
- CPollens and Marsh gas
- DOzone
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Give differences: $BOD$ and $COD$.
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$(i)$ Pollution
$(ii)$ Greenhouse effect
$(i)$ Pollution
$(ii)$ Greenhouse effect
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View SolutionWhat is $BOD$?
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