The value of natural resources is increased by secondary business. Changing the form of raw-material obtained from nature makes them more valuable and useful. The secondary business is related to manufacturing industries of all types. In this economic ativities utility of goods increases and become more valuable.

For example, cotton is an agro-produced raw-material and has limited use, but when it takes the form of cotton yarn through manufacturing activities, it becomes more useful as well as valuable. Now, it is used to manufacture cloth. Naturally obtained minerals have no use at all but after refining and purifying them in the manufactuing industry, they become more valuable and more useful goods.