Based on people’s proportion in a nation involved in an activity, the economy is divided into sectors according to the range of distance from the natural environment and is as follows:
- Primary Sector involves extracting or harvesting natural products. Activities related to this sector include farming, hunting, mining, quarrying, fishing, and agriculture. In the U.S. about 3% of the labor force is in this sector.
2. Secondary Sector engages in the construction, processing, and manufacturing of finished goods. Some examples of activities involved are automobile production, textile production, chemical and engineering industries, shipbuilding, breweries, energy utilities, and metalworking.
3. Tertiary Sector provides services to businesses and the public. Some of the activities associated are transportation, entertainment, retail and wholesale sales, restaurant, tourism healthcare, banking, and law. In developed and developing nations a large percentage of the population is in this sector for instance in the U.S. more than 80% of the labor force is in this sector.
4. Quaternary Sector consists of intellectual pursuits such as education, information technology, and scientific research. It includes those involved in the highest level of decision-making in the economy or society, for example, representatives of government, science, culture, media, and universities.