| Hybrid cars are becoming more popular with the | | | | Flexible fuel vehicles are the ones which work well |
| increase in price of gasoline. Nowadays people are | | | | with combination or mixture of different fuels. They |
| more interested in cars that can run of alternative | | | | can work on a combination of 15% gasoline and 85% |
| sources of fuel. Cars that run on HHO fuel, NGV or | | | | ethanol (E85). This is possible due to its unique fuelling |
| natural gas obviously have a low running cost. Not only | | | | system which is ethanol compatible. |
| that, they are also good for the environment and help | | | | Another fuel which has been used in vehicles since the |
| in keeping the pollution level under check. Hybrid cars | | | | 1920s is propane. In fact there are vehicles especially |
| usually work by combining two or more sources of | | | | designed to run on propane. There are also the |
| power. Motorized pedal bike would be an ideal | | | | bi-propane vehicles which have a dual fuelling system |
| example since it works by combining the rider's pedal | | | | thus allowing the user to either use gasoline or |
| power and the power of the gasoline engine. There | | | | propane. Such engines that run on propane are said to |
| are also the Electric vehicles (EV) which are propelled | | | | be more efficient than those that run on gasoline. Also |
| by fuel cells. | | | | they do not require too much maintenance. |