Sources of Energy

Energy is the largest industry in the world, by far. It is worth anywhere between 6-8 trillion $ per year, in a world whose GDP is about $52 trillion. 

Energy sources can be divided into two types: renewable energy sources and nonrenewable energy sources.

The energy which replenishes itself quickly and which is available in never ending supply is called as the renewable energy. The renewable energy comes from natural resources like sun, wind, water (tides and rainwater), heat from the earth (geothermal heat), biomass etc.

The energy sources that cannot be recreated and which go on depleting as we use them are called as the non-renewable energy sources. At present most of the needs of the world are fulfilled by non-renewable sources of energy. The most extensively used non-renewable energy sources are the fossil fuels that comprises of oil, natural gas and coal.



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