In the context of proposals to the use of hydrogen-enriched CNG (H-CNG) as fuel for buses in public transport, consider the following statements : 1. The main advantage of the use of H-CNG is the elimination of carbon monoxide emissions. 2. H-CNG as fuel reduces carbon dioxide and hydrocarbon emissions. 3. Hydrogen up to one-fifth by volume can be blended with CNG as fuel for buses. 4. H-CNG makes the fuel less expensive than CNG. Which of the statements given above is/are correct?
a
1 only
b
2 and 3 only
c
4 only
d
1, 2, 3 and 4
Renewable Energy & Pollution ControlHydrogen-enriched CNG (H-CNG) as fuelH-CNGhydrogen-enriched CNGcarbon monoxide emissionscarbon dioxide emissionshydrocarbon emissionsfuel costpublic transport