An object or substance becomes a resource only when it has a value. The usefulness of the object gives it a value. As a resource is something that has utility, all resources have some value.

The value of the object can be classified into two categories:

• Resources that have economic or commercial value.
• Resources that do not have economic or commercial value.

Metal is a resource that has economic value as we make many products from it, for our daily use.

On the other hand a beautiful scenery you see may not have economic value but is still considered a resource as it is useful in giving pleasure to the human mind.