The primary industry is manufacturing, such as farmers and fishermen. The tertiary industry refers to the service industry, such as travel companies, game agencies and so on.
These industries will also be affected by the economic crisis, but not as big as the secondary industry. In recent 10 years, the fourth industry, a new industry, mainly refers to some industries engaged in high-tech or technology research and development. For example, Microsoft and Nintendo mentioned on the first floor, as well as the pharmaceutical industry, even including drug refining.
Because their costs are generally low, their products mainly sell technical patents or high-content technical essence. On the other hand, if you are engaged in a monopoly industry, whether there is an economic crisis or not, your risk is always the least. Because you have mastered the supply and demand relationship of the whole market, the price decision is in your hands.
Extended data:
Characteristics and trends of modern energy production and consumption;
The quantity of energy production and consumption is increasing, and it is growing rapidly. No matter the total energy consumption or per capita consumption in the world, it has been in a sustained growth momentum. For example, during the period from 1850 to 1950, the energy consumption increased from 1 100 million tons to 2.5 billion tons, which was 2.8 times higher than that of 1980 and exceeded that of 1 100 million tons (standard fuel).
From 1850 to 1950, the per capita consumption increased from 1 15 kg to 1000 kg. After entering the 1980 s, it exceeded 2000 kilograms. It is predicted that the total energy supply in the world in 2000 will be146.6 ~1865438+700 million tons (standard fuel). The reasons for the rapid growth of world energy production and consumption can be summarized as follows:
(1) The rapid economic growth of all countries in the world has increased the energy demand;
(2) Population growth is also an important factor affecting the growth of world energy demand;
(3) After the Second World War, the industrial structure of developed countries accelerated the transformation to heavy chemical industry, especially the development of high energy-consuming industries, which made the energy consumption show an unprecedented growth rate.
Heavy industry in many developing countries has also developed greatly, which has increased energy consumption. In the future, with the development of science and technology, the industrial structure of many industrialized countries is developing in the direction of technology-intensive and economic service, and the natural growth rate of the world population is declining.
Baidu encyclopedia-the second industry