Arrange the following fuels in the decreasing order of air pollution caused by burning a kilogram of each of them :

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Q: 108 (CAPF/2014)
Arrange the following fuels in the decreasing order of air pollution caused by burning a kilogram of each of them :

question_subject: 

Science

question_exam: 

CAPF

stats: 

0,46,38,22,46,13,3

keywords: 

{'fuels': [0, 1, 0, 1], 'air pollution': [5, 0, 0, 3], 'diesel': [1, 0, 0, 1], 'petrol': [2, 0, 1, 5], 'order': [6, 12, 34, 35], 'kilogram': [0, 0, 0, 1], 'cng': [0, 0, 1, 2]}

Option 1: CNG, Petrol, Diesel

Option 2: Diesel, Petrol, CNG

Option 3: Petrol, Diesel, CNG

Option 4: Diesel, CNG, Petrol

The correct answer is option 2, which states that the fuels should be arranged in the following decreasing order of air pollution caused by burning a kilogram of each of them: Diesel, Petrol, CNG.

Burning fuel releases pollutants into the air, contributing to air pollution. While all fuels produce some level of pollution when burned, the amount varies depending on the fuel type.

Diesel fuel tends to produce higher levels of particulate matter (PM) and nitrogen oxide (NOx) emissions compared to other fuels. These pollutants contribute to smog formation and have detrimental effects on human health.

Petrol, or gasoline, emits lower levels of PM and NOx compared to diesel but still contributes to air pollution. It is a major source of volatile organic compounds (VOCs) and carbon monoxide (CO) emissions.

Compressed Natural Gas (CNG) is considered the cleanest burning fossil fuel as it produces significantly lower levels of PM, NOx, VOCs, and CO compared to diesel and petrol. It is