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Subject :NSO    Class : Class 5

The best way to reduce air pollution in cities is to .

Areduce the height of the buildings so that the polluted air can escape
Bbuild the cities out in the open countryside where there is no air pollution
Cimprove the public transport system so as to reduce the number of fuel burning vehicles
Dbuild better roads so that more cars and trucks can get people and goods around the city faster.


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