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    				| 1. | Hydrogen has been used as a rocket fuel. Would you consider it a cleaner fuel than CNG? Why or why not? | 
| Answer» SOLUTION :Hydrogen gas is CLEANER than CNG. CNG contains hydrocarbons. So, it has CARBON contents. Carbon is a form of pollutant present in CNG. On the other hand, hydrogen is WASTE free. The burning of hydrogen does not produce any waste. Hence, hydrogen Is cleaner than CNG. | |