Alternative energy sources are the ones that can be used as an alternative to the energy sources or fossil fuels used now- a-days to meet the energy demands. There are many alternative energy resources and their uses are many. Alternative energy sources are used because they are easily and freely available.
In earlier times, wood was earlier considered to be an alternative energy source mainly because it was abundantly available in the forests and it was always believed that the forest cover on this earth will never cease to exist. But the increase in the rate of deforestation, wood is no longer used an alternative energy source although it provides an alternative to oil.
Hydropower or hydro electric energy as it is more commonly called is the alternative energy source generated from running water in the form of electricity. Reservoirs need to be built to collect the running water which can be later used for the purpose of electricity generation. But hydropower cannot be considered to be a true source of alternative energy. The reason is that all the reservoirs in which water is stored to generate electricity eventually get filled with sediment and this causes problems in generating electricity and a dam site can be used only once.
Another promising alternative energy resource being developed is the fuel. These are used for producing electricity and do not cause any pollution.
Alternative energy sources are a viable option that can be used in the future for many purposes efficiently and cost effectively.
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