ANSWER: Both
Explanation:
Alternative fuel:
Methanol is readily biodegradable. It is already used in racing cars of China.
Ethanol burns cleaner and burns more completely than petrol
It can be derived from Sugar cane juice and molasses.
Hydrogen Fuel is a clean fuel with highest energy content in terms of mass. Hydrogen up to 20% (by volume) can be blended with compressed natural gas (CNG) for use as an automotive fuel.
