From health and safety point of view, CNG is as good as, or better than,
petrol and other alternative fuels. The following properties make it a desirable fuel:
- Natural gas is lighter than air. In the event of a leak it will rise and disperse in the atmosphere and not form puddles (as in petrol) or spread (As in LPG).
- The ignition temperature of Natural Gas is much higher than petrol making it more difficult to ignite.
- A high gas concentration in the air is needed to ignite CNG, not easy to achieve even in event of leak. Natural gas will not burn when its concentration in air is below 5% of above 15%.