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CBSE Notes 2011-2012

Why was there heavier smog in Calcutta than in other cities in the northern India ?

Multiple choice question

Why was there heavier smog in Calcutta than in other cities in the northern India ?

unknown

The city had a large population who depends on dung or wood as fuel

unknown

The city was built on a marshy land

unknown

The city had more industrial units

unknown

All the above