When food in supermarkets passes its sell-by date, though, it gets swept off the shelves. Often, it's donated to food banks. Sometimes it's auctioned off. But if you discover such food in your pantry at home, there's really no reason to throw it out.
Production lifecycle. The primary sector of the economy is the sector of an economy making direct use of natural resources. This includes agriculture, forestry, fishing and mining. In contrast, the secondary sector produces manufactured goods, and the tertiary sector produces services. The primary sector is usually most important in less-developed countries, and typically less important in industrial countries.
Primary, secondary and tertiary sectors. There are three main types of industry in which firms operate. These sectors form a chain of production which provides customers with finished goods or services. Primary production: this involves acquiring raw materials.ertiary production: this refers to the commercial services that support the production and distribution process, eg insurance, transport, advertising, warehousing and other services such as teaching and health care.