8th Class Science Combustion and Flame Question Bank Combustion and Flame Summative Subjective Problems

  • question_answer
    Explain how the use of CNG in automobiles has reduced pollution in our cities.

    Answer:

    Combustion of fuels like petroleum causes formation of un-burnt carbon particles along with carbon monoxide gas. These harmful pollutants enter the air and cause respiratory diseases. Compressed Natural Gas (CNG) produces these harmful products in very less quantity. It is a comparatively cleaner fuel. Therefore, the use of CNG has reduced pollution in our cities.


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