"Quantitative Changes in World Population" Facing unprecedented challenges together PPT

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"Quantitative Changes in World Population" Facing unprecedented challenges together PPT

Part One: World Population Growth

1. World population: As of October 31, 2011, the world's population reached 7 billion.

2. World population growth trends and characteristics:

①The general trend of the world's population has been growing since records began.

②In different historical periods, the characteristics of population growth are different.

A. Before the Industrial Revolution, the world's population grew slowly.

B. After the industrial revolution, the world's population growth rate has greatly accelerated. Especially after the end of World War II, the population of most developing countries increased rapidly, causing a sharp increase in the world's total population.

3. Indicators of population growth: The natural growth rate of the world's population, usually expressed by the natural population growth rate. The natural growth rate of population is determined by the birth rate and death rate.

①The birth rate is the ratio of the number of babies born in a country or region to the total number of people in a year, usually expressed in thousandths. Birth rate = number of births in the year/total population.

②The population mortality rate is the proportion of the number of deaths to the total number of people in a country or region within a year, and is usually expressed in parts per thousand. Population mortality rate = number of deaths during the year/total population.

③The natural growth rate of the population is the birth rate minus the death rate, that is, the natural growth rate of the population = birth rate - death rate. The higher the natural population growth rate, the faster the population will grow.

4. The relationship between population growth rate and economic development level:

5. Population growth and population migration:

In addition to being affected by natural growth, the population growth of a region is also closely related to population migration. In today's society, it is very common for people to move out and move in to new places of residence. Population migration includes both international population migration across countries and regions, and domestic population migration within a country.

Quantitative changes in world population PPT, part 2: World population issues

1. Overall situation: The situation of natural growth of the world's population is different in different countries and regions, so the population problems they encounter are not exactly the same.

2.Performance:

3. Understanding: Maintaining a reasonable population size and population growth rate in a region is conducive to economic and social development.

Based on the above information, describe the characteristics of population growth in India and Japan; analyze what problems different population growth situations bring to the two countries.

Features:

India: Large population, population growth is too fast.

Japan: Population growth is too slow and the population is aging seriously.

question:

India: Rapid population growth will not only put pressure on the country’s resources and environment, easily causing serious resource and environmental problems, but will also bring about serious social problems, such as huge consequences for education, housing, employment, etc. pressure.

Japan: The increase in the elderly population and the decrease in the newborn population have led to a reduction in the labor force, which has seriously affected the development of the national economy.

Tip: The population problems in India and Japan represent the population problems faced by developing and developed countries respectively. Population growth that is too fast or too slow is not conducive to social and economic development.

Quantitative changes in world population PPT, Part 3: Population policies of different countries

Japan: Encourage citizens to have more children. The first and second children can receive a monthly subsidy of 5,000 yen from the government, while the third child can receive a monthly subsidy of 10,000 yen.

Italy: Babies born from the second birth can receive a one-time subsidy of 1,000 euros paid by the government.

India: It advocates "only one child is good", encourages small families of three, and gives birth to boys and girls alike.

Indonesia: It stipulates that "couples can freely decide the number and spacing of children", but "(the) decision must be consistent with conscience and responsibility to current and future generations and consistent with policy."

Iran: The "Population and Family Planning Law" stipulates that the fourth and subsequent children born one year after the promulgation and implementation of this law will no longer enjoy all preferential conditions regarding the number of children stipulated in the law.

Quantitative changes in world population PPT, part 4: easy to make mistakes

Because the world's population is large, the less population growth the better.

This statement is wrong.

Population growth is not more, the better, because the carrying capacity of the natural environment is limited; population growth, less, the better, because it will lead to a shortage of labor and cannot meet the needs of social and economic development. Therefore, reasonable population development should be compatible with the level of social and economic development and coordinated with resource development and environmental protection.

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Update Time: 2024-11-22

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