Define natural exhaustible resources. Mention different types with suitable examples.

Natural exhaustible resources are those which are present in nature but they are going to finish if they are wasted and not used sustainably. There are two types of natural exhaustible resources.

(1) Renewable resources: They can be replenished and are returned to the physical environment after being used by man. For example: water, $C{O}_2,N_2$, useful plants and animals.

(2) Non-renewable resources: They are exhausted after their uses and ire not replenished in nature. For example: fossil fuels, metallic ores.