Answers

2015-08-30T21:15:17+05:30
Smog is a noxious mixture of particles and gases which is usually found in urban areas. 
Smoke is the visible vapor, gas,and fine particles given off by burning something.
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2015-08-30T22:27:37+05:30
Simply, smoke is released from vehicles. it pollutes atmosphere. when smoke gets mixed with fog it becomes smog
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