Answer:
Here's what I find
Explanation:
1. Advantages
(a) Less atmospheric pollution
Low emissions — less CO, CO₂, HC, and NOₓ.
(b) Less noise pollution
CNG engines are quieter than gasoline and diesel
(c) Economic
(i) Lower maintenance costs
(ii) Cheaper fuel than gasoline and diesel.
(d) Safer
CNG cylinders are less dangerous than gasoline and diesel tanks in case of an accident.
(e) Lower maintenance costs
Longer periods between tune-ups and oil changes.
(f) Better performance
An octane rating of approximately 120. Regular gasoline is about 87 octane.
2. Disadvantages
(a) Higher up-front cost
CNG vehicles are more expensive than the diesel/gasoline versions.
(b) Shorter range
Shorter range means more frequent fill-ups.
(c) Limited Accessibility
(i) Few makers are building CNG automobiles
(ii) Relatively few CNG fuel stations
(d) Poorer performance
The added weight of the fuel tank reduces acceleration and performance.
(e) Reduced storage space
Bulky fuel tanks reduce cargo space.
(f) Safety
Gaseous methane requires better engineering to prevent leaks.
