Question

The major contributor of carbon monoxide is

• A. Motor vehicle
• B. Industrial processes
• C. Stationary fuel combustion
• D. Domestic usage

Hint:

Carbon monoxide is a harmful pollutant mainly emitted by motor vehicles due to incomplete fuel combustion. Reducing vehicle emissions can significantly improve air quality.

Answer 1

The Correct Option is A

- Motor vehicles are the largest source of carbon monoxide emissions, primarily due to incomplete combustion in internal combustion engines. 
- Other sources include industrial processes, stationary fuel combustion, and domestic usage, but they contribute less to overall carbon monoxide levels. 
Conclusion: 
The major contributor of carbon monoxide is motor vehicles, as given by option (A).