The pie chart provides the data on different metro cities around the world are affected by primary pollutions during 2017. Overall, overall carbon Monoxide is the major primary pollutants which is emitted by vehicles used for transportation.
The first pie chart represent carbon Monoxide covers half part nearly 51.10% was covered, remaining 49.90% is covered by Nitrogen oxides, volatile organics, sulfur oxides and particulates, where particulates contributes least percent about 7.10% and sulfur oxides has 16.20% where nitrogen oxides and volatile organics each has nearly 13% which is caused has an primary pollutants.
The second pic chart represents major source of pollutants is achieved by transportation, quoter portion about 25.30% has polluted by stationary source fuel combustion remaining 25.50% is covered by Industrial process, miscellaneous and solid waste disposal.