Classification on the basis of Renewability
Depending on the duration and availability of resources, they can be classified into three categories:-
1.Renewable resources:
These resources are inexhaustible in nature. They can be regenerated after their utilization or are present in unlimited quantities and are unlikely to get diminished. Some of the examples are: forests, land, water, etc.
2. Non Renewable Resources:
These are Exhaustible in nature as they are present in very limited amount. Once used, these can't be produced again as millions of years are required for their formation. For example, fossil fuels are non renewable resources as their formation requires millions of years.
3. Cyclic Resources:
These are the resources which can be used again and again in the same form or some other form. These resources are replenished and recycled by various natural processes. Water and sun are examples of cyclic resources which are used by man.
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Fundamentals