Question

What measures can be taken to control the emission of air pollutants from automobiles?

• A. Use of lead-free petrol or diesel
• B. Use of catalytic converters
• C. All of the above
  
• D. Proper maintenance of automobiles

Answer 1

The correct option is C All of the above


Need to control automobile emissions
The main cause for air pollution is automobile emissions. It is important to control automobile emissions to combat air pollution. The use of unleaded fuels, catalytic convertors and proper maintenance of automobiles helps in doing so.

Advantage of proper automobile maintenance
The proper maintenance of automobiles is important to ensure proper engine efficiency so that the fuels are completely burnt. Unburned fuels will cause pollution.

Advantage of lead-free fuels
Lead was previously used in automobiles to prevent engine knocking (the uneven burning of fuel). Lead affects human health by getting accumulated in the blood, reducing the oxygen carrying capacity. Also it damages the functionality of catalysts in catalytic converters. Nowadays, lead-free petrol is used to prevent air pollution.

Advantage of catalytic convertor
A catalytic converter uses a catalyst to change the harmful compounds emitted by an automobile engine into relatively less toxic gases like carbon dioxide and steam.