O 500 U 1825 LEG

CNG Buses

What is CNG ?

How safe is CNG

Compressed natural gas mixes with air and becomes flammable only when the mixture is within 5 and 15 percent of natural gas to air.
Below 5 percent, natural gas does not burn.
Greater than 15 percent not enough oxygen to allow natural gas to burn.
Natural gas is lighter than air and dissipates when released from containment.


  • Natural gas is produced at relatively low cost.
  • The gas is cleaner burning than petrol or diesel.
  • Natural gas vehicles show an average reduction in ozone forming emissions of 80 percent compared to petrol and/or diesel vehicles.

Engine Working