In Economics and Geography, human economic activities are divided into Primary, Secondary, and Tertiary sectors. The Secondary Sector is the bridge that turns raw nature into usable products.
The period in history when countries rapidly shifted their focus from primary farming to secondary manufacturing is known as the Industrial Revolution.
Secondary activities are those activities in which raw materials extracted from the primary sector are manufactured into finished, more valuable products.
Because this sector is mostly associated with different kinds of industries, it is also widely known as the Industrial Sector or Manufacturing Sector.
No country can become rich purely by selling raw materials. The secondary sector adds massive value. For example, a kilo of raw cotton is cheap, but a designer shirt made from that cotton is expensive. It also generates massive employment for factory workers.
**Mining is a Primary activity** because you are extracting a raw material directly from the Earth. However, *refining* that mined ore into usable metal in a factory is a Secondary activity.
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