What are the advantages of having a large world population, and what are the disadvantages of having

The rapid growth of the world's population poses enormous challenges to sustainable development. The world's population has soared from 2.5 billion in 1950 and 4.4 billion in 1980 to more than 6 billion in 2000. According to the World Summit on Sustainable Development, the United Nations expects the global population to increase to 8 billion by 2025 and 9.3 billion by 2050, with the global population expected to stabilize at around 105 or 11 billion.

Almost all of the future population growth will come from developing countries, and the world will have to feed an additional 5 billion people in the future. As populations grow and people's living standards improve, land, water, energy and other natural resources will become more strained, especially in developing countries, potentially triggering unprecedented crises. According to the latest United Nations report, Asia's population growth rate is declining, but population density is still higher than that of other continents, and in East and South Asia, where only one-sixth of arable land is held per capita, population growth, land pressure and water shortages for agricultural irrigation will force these regions to increase food imports to reduce hunger and improve nutrition.

It is manifested in the following aspects: more than 1 person, the per capita area is smaller, more than 2 people, the road is congested, 3 more people form employment problems, more than 4 people, resources are relatively tight, more than 5 people, more environmental pollution The United Nations warns that although Africa's current population density and per capita arable land are higher than Asia's, its population is expanding dramatically, and the trend is very dangerous. At the same time, the overall decline in the growth rate of the world's population since 1950 has been accompanied by the emergence of small families, which have enabled them to invest more in education, nutrition and health for the next generation, which is conducive to long-term sustainable development.

But the United Nations warns that the quality of the world's population is being eroded by AIDS, especially in Africa, which has become a major cause of death in sub-Saharan Africa, reducing life expectancy by 15 years, and is a major problem for the world's population.

A large world population is conducive to generating more productivity within limited technological resources, and is conducive to improving overall productivity in a short period of time and rapidly raising the economic level. The most unfavorable factor of the world's low population is the lack of development potential, which means that the reduction of productivity, especially the low birth rate, is likely to lead to serious aging, the lack of young labor force, and the stagnation of the whole world.

The advantages of a large population: 1. Increase in labor force 2. Boost domestic demand 3. Abundant military resources (such as China) Disadvantages of a small population: 1. Lack of labor force 2. Insufficient domestic demand Insufficient military resources (such as Russia) Hope.

The world's resources are certain, if there are more people, the earth will not be able to feed, too many people will give"Democracies"The development of the lag. If the population is too small, it is not conducive to the development of the nation, there is a lack of labor, and it may lead to the extinction of the nation. So it's best to maintain a certain amount.

Clean water sources are scarce and difficult to supply drinking water, sewage treatment or sewage. Some countries, such as Saudi Arabia, use expensive desalination to address water shortages.

Depletion of natural resources, especially fossil fuels.

Increase air pollution, water pollution, land pollution, and noise pollution. When the country industrializes and becomes rich, even if the population continues to grow, a series of control measures and technological innovations will lead to a significant reduction in pollution.

Deforestation and destruction of ecosystems have caused imbalances in global atmospheric oxygen and carbon dioxide levels; About 8 million hectares of forest are cut down every year.

Changing the composition of the atmosphere leads to global warming.

Cultivated land is deserted, and desertification is approaching. Deforestation and desertification can be reversed through the use of property rights, a policy that remains effective even as the population continues to grow.

Slash-and-burn tillage is sometimes used in rotational tillage, especially in countries with booming farmer populations, leading to the loss of tropical rainforest habitat and inducing mass extinctions and biodiversity decline; The current rate of extinction could be as high as 140,000 species per year.

New epidemics and plagues emerge. Humans are conditioned by antibiotic-resistant diseases, and new viruses infect humans. The poor are more vulnerable to infection due to many environmental and social factors, including overcrowding, malnutrition, and lack of access to health care.

Due to the depletion of water resources, the poor sewage system has led to a polluted living environment. Of course, these problems can be solved by installing sewers. For example, the installation of sewers in Karachi, Pakistan, has led to a significant reduction in infant mortality.

The lack of a way out has led to an increase in criminal activities such as drug trafficking and theft.

The carrying capacity of the world's population.

Some organizations, such as the World Nature** and the Global Footprint Network, claim that the carrying capacity of the population in terms of ecological footprint is overloaded. In 2006, the World Nature's Planetary Survival Report called it three more times for the planet to renew its resources in order to make everyone consume like Europeans.

By 2006, humanity as a whole used more than 40 percent of the resources that the planet could provide. However, Roger Martin of Population Matters said, "The poor want to get rich, and I want them to get rich," but later added, "Of course we have to change our spending habits."

But we also have to stabilize the numbers."

In 2014, another study by the World Nature** showed that the current level of human consumption needs to double the earth's ecological carrying capacity.

Benefits of a larger population:

2.Market size: Companies and businesses can directly face the huge market and promote their products or services.

4.Cultural exchange: A larger population can lead to richer cultural exchange, which in turn promotes cultural pluralism and exchange.

The disadvantages of a large population:

1.Competitive pressures: A large population puts more competitive pressure on the job market, especially in economic centers like large cities.

2.Environmental degradation: A large population may lead to environmental degradation, including air pollution, water pollution, etc.

4.Resource-constrained: A large population can put pressure on a city's resources and public services, such as transportation, healthcare, housing, etc.

5.Disease transmission: Large populations can easily lead to outbreaks and spread of infectious diseases, especially in crowded urban environments.

Too much population comes with the following advantages and disadvantages:

Disadvantage: 1Overpopulation can lead to over-consumption and over-contamination of the environment, which can have a detrimental impact on existing biomes and entire ecosystems.

2.As the population increases, large cities and urbanization processes also bring various problems, such as shortage of air and water resources and sanitation problems due to population density and pollution.

3.Large concentrations of people can lead to social and political pressures, such as food hygiene, health care, populism, and social inequality.

As a result, overpopulation may put too much pressure on the planet. Due to its consumption of resources and the environment, appropriate measures must be taken to reduce its negative impacts, such as controlling population growth, improving resource utilization efficiency, and vigorously developing clean energy.

The advantage of a small population is that there is relatively little pressure on resources and the environment, and at the same time, the society is relatively easy to manage.

The disadvantages are from the perspective of the country as a whole, such as the shortage of labor, the low international competitiveness, the lack of war capability, and so on.

For example, if China had only 200 million people, the United States would never have made China the number one threat. Think about the fact that more than a billion people have to get warm, eat food, wear warm clothes, and even drive, travel, and consume ......

The advantage is that resources per capita are abundant, and the disadvantage is that labor is scarce.