This is the most famous classification which you must have read many times. On the basis of availability, the natural resources are classified as –
Renewable resources are those which can be replenished by nature in a short period of time. These include, air, water, crops, forests etc. However, their rate of replenishment can differ according to the resource.
Non-renewable resources are formed over a very long geological period. These include minerals and fossil fuels. Since their rate of formation is very slow, they cannot be replenished quickly once they are used. Hence their supply is limited and exhaustible. There are some resources which can be recycled, like metals etc. while some resources cannot be recycled eg. Coal, natural gas etc.
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