Increasing human population, industrialization and urbanization is rapidly spreading over the urban areas and deteriorating the environmental quality continuously. Air pollution became a major problem in compared to the other types of pollution due to its harmful effects on man and materials and difficult remedial measures. The major sources of the air pollution are industries and vehicles that emitting many air pollutants to the ambient environment as well as the life on the Earth. Present study was carried out to know the role of vehicles on the air quality of Patan city of Gujarat. The study has been carried out in four zones of the city, viz., residential zone, industrial zone, commercial zone and suburb zone. All the sites were investigated for the carbon emission by scrutinizing the vehicle load with their fuel use pattern and then it was calculated using carbon calculator. It was found that the vehicles operated by diesel are contributing more carbon to the atmosphere in Patan city in compare to petrol and gas operated vehicles.
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