Automobile Pollution and Its Control: 

Automobiles are said to be one of the major causes for atmospheric pollution at least in the metro cities. 

Main causes of automotive pollution: 

Poorly design and poorly maintained automobiles: 

You must have seen on roads a bus or truck or car or tempo releasing black smoke. This is because of poor maintenance of the vehicle.

Incomplete burning of fuel air mixture: 

Poorly maintained vehicle’s engine does not burn the fuel completely or properly. It can also happen because of improper mixture of air and fuel. Adulterated or poor quality of fuel: Petrol or diesel mixed with non-standard liquids/ substances increase the pollution. Excess use of clutch while driving: The habit of riding on clutch while driving increase the fuel consumption and increase the pollution. 

Its Control: 

Proper maintenance of automobiles along with use of lead-free petrol or diesel can reduce the pollutants they emit. Catalytic converters, having expensive metals namely platinum-palladium and rhodium as the catalysts, are fitted into automobiles for reducing emission of poisonous gases. As the exhaust passes through the catalytic converter, unburnt hydrocarbons are converted into carbon dioxide and water. Also, carbon monoxide and nitric oxide are changed to carbon dioxide and nitrogen gas, respectively. Motor vehicles equipped with catalytic converter should use unleaded petrol because lead in the petrol reduces effectiveness of the catalyst. 

Good driving habits: 

It reduces the pollution by reducing the fuel consumption.