In the present day most of the energy demands are met by oil such as kerosene, gasoline and diesel fuel. They are very popular and commonly used sources of energy and have several benefits. The main advantage of oil is that it is available in abundance. It is easy to transport and can provide a lot of energy as they have a high energy density.
The question that comes to ones mind is that why do we need to use alternative energy resources when these fuels are available in abundance?
The fact is that the oil reserves so abundantly available are not going to last forever. There will come a time when the no oil will be available in the world or if available it will become too expensive to drill for oil. Alternative energy resources provide a solution to this problem as they are renewable. This means that alternative energy sources will always be available for use as they are replenished by the nature.
Alternative energy sources also do not cause pollution and do not affect the environment adversely. They are also less costly.
