What do you mean by "natural growth" and "mechanical growth" of population?

1, "natural population growth" refers to the data obtained by natural population reproduction and death (death includes disease, war, etc. In a certain area, this is called natural growth.

2. "Mechanical population growth" refers to the population change in a certain area on the basis of population migration.

1. Natural population growth rate

Sentence: 1. Urbanization is of positive significance for developing economy and controlling the natural population growth rate.

The natural population growth rate in rural areas is rising.

He said that Israel must stop all settlement activities, including houses built to meet the natural population growth.

4. At present, the natural population growth rate in China has dropped to the bottom, and the future impact on the actual consumption of Chinese residents is limited.

2. Population mechanical growth: Ré n k ǒ u j οēēēēēēēēēēēēēēē?

Knowledge expansion: there is a strict distinction between this kind of population migration relationship, that is, people have to live for a long time when they enter the migration destination.

For example, if someone moves to another city, then the target city can classify him as "mechanical growth".

For example, someone who has obtained a foreign nationality certificate and emigrated can be included in the "mechanical growth" of the target country.

For example, a person traveling abroad for five years can also be regarded as "mechanical growth" in the target area.

According to the geography book, before the household registration reform in 1970s and 1980s, the country mobilized farmers to cultivate across provinces on a large scale, which was also a "mechanical growth" for the target provinces and regions, but it was not a mechanical growth in China.