Formula: birth rate - death rate, unit: % or ‰

Meaning: The natural population growth rate is greater than 0, indicating positive growth, equal to 0, indicating zero growth, and less than 0, indicating negative growth.

Description language: Indicates how fast or slow the population of a certain place is growing.

The natural growth rate of population is closely related to the level of economic development: Generally speaking, countries with a high level of economic development have a slower natural population growth rate; countries with a low level of economic development have a faster natural population growth rate.

Formula: total population/total area, unit: person/km²

Meaning: How many people live within 1 square kilometer

Description language: Indicates the density of population distribution in a certain place

Before 1800 AD, the world's population grew very slowly. After that, the world's population entered a period of rapid growth.

At present, the world's population has exceeded 8 billion and is still growing at a rapid rate.

Generally speaking, the world's population is unevenly distributed, with densely populated areas mainly concentrated in coastal areas at mid- to low-latitudes.

Specifically, it is divided into four dense areas and four sparse areas.

White race: Mainly distributed in Europe, North America, northern Africa (North Africa), western and southern Asia (West Asia) and Oceania.

Yellow race: Mainly distributed in eastern Asia, the American Indians and the Inuit along the Arctic Ocean belong to the yellow race.

Black people: Mainly distributed in central and southern Africa ("the hometown of black people"). Due to historical reasons, there are also a certain number of black people in the Americas.

The six working languages ​​of the United Nations: English, Chinese, French, Russian, Arabic, Spanish

English: the most widely spoken language in the world

Chinese: the most spoken language in the world

Christianity

Islam

Buddhism