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what is the difference between renewable and nonrenewable source of energy?
Those sources of energy which are being produced continously in nature and are inexhaustible ,are called renewable sources of energy.For example : wood is a renewable source of energy because if trees are cut down from the forests for obtaining wood,then more trees will grow in the forests due course of time.So,the loss of wood by cutting trees is made good by nature.
The  renewable sources of energy are also called non - conventional sources of energy. 
Those sources of energy which have accumulated in nature over a very,very long time and cannot be quickly replaced when exhausted are called non - renewable sources of energy.
For example ,coal is a non - renewable source of energy because coal has accumulated in the earth over a very,very long time ,and if all the coal gets exhausted ,it cannot be produced quickly in nature.The non - renewable sources of energy are : Fossil fuels (coal,Petroleum and Natural gas ), and Nuclear fuels (such as  uranium).Non renewable sources of energy are  dug out from the earth.


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