Energy sources that are used or usable in research as alternative forms of energy. There are a variety of sources of alternative energy sources can replace ordinary. If these alternative energy sources can be used for each of them is the house depends on the time changes.
The most important energy source is wood. Long ago, the wood was originally used to heat the wood stoves and cooking. In the current environment, wood is increasingly difficult to find and people seek new ways to replace the use of wood. Coal is often substituted as an alternative energy source. Coal is abundant. By simply creating a coal mine, will be present.
Another alternative energy source oil. Whale oil was once in the 19 Century used, but has since been replaced by oil. Whale oils were generally used for lamp fuel and lubricants. The oil is not used because it is much cheaper to produce.
» Read more: Evolution of Different Types of Alternative Energy and Their Uses in Our Society