Earth culture is how many?

Biologists try to calculate how many people the Earth biosphere can maintain. Optimistic forecasts suggest that even though humanity is up to 10 billion, it is still possible to avoid hunger. But with the current population growth rate, this limit is quickly broken.

According to Pravda , since the end of the 18th century, the philosopher Thomas Malthus in a research work on the future of humankind has argued that the irreparable difficulties of mankind are population growth, and the inevitable is the redistribution of population across the planet, the exhaustion of all resources and ultimately hunger.

Where does the earth go when it comes to the peak of its ability to protect human existence?

According to calculations by modern scientists, the maximum permissible capacity of the planet is between 9 and 10 billion people. Sociologist Edward Wilson relied on his assessment of the available resources to predict the future of humanity.

First, the amount of fresh water has reached the limit of use. Second, the Earth could not produce enough food as 200 years ago. Even if the whole grain is only used for human consumption, ignoring the needs of the cattle (because that is the method of converting plant energy into animal energy with very low efficiency) it is not possible. fully meet the demand.

According to Wilson, "if everyone agrees that, without using grain to feed cattle , cultivation of 1.4 billion hectares of farmland could not feed 10 billion people." on that area, the maximum area is 2 billion tons of cereals per year, if the whole world does not eat meat, just eat bread and drink water, it is enough, but if the current diet, the amount of grain that only meets one quarter of the demand or in other words, it is enough to feed 2.5 billion people (most of the grain is used for livestock and poultry).

Anthropologist Doel Koen, of Columbia University (New York) added a number of factors limiting the planet's ability - that of nitrogen circulation, the rate at which carbon dioxide is processed in the atmosphere, protection ensure enough phosphorus . for plants. Even when the world population tends to eat only vegetables, we will die of not having enough oxygen if we don't starve to death.

Since humans themselves are affecting the atmosphere, it is not possible to know exactly how much greenhouse gases will increase even though scientists are focusing on finding ways to prevent the Earth from turning into a home. giant glass. Koen concluded with confusion: "Strictly speaking, no one knows when and to what extent the human population will reach its limit."

The world has surpassed 7 billion people. According to the UN forecast, in 2100, the world population will reach 9 billion. But will 90 years later, humans be able to reverse the situation? Currently, people are witnessing a strong development trend, which is the family size is getting smaller and smaller. Looking at the statistics of 230 countries, starting in 1950, researchers came to the conclusion that, in most countries, birth rates continued to decline.

Currently, the birth rate of each woman is an average of 2.1 children, making the population still slightly increase. If the global population growth rate is equivalent to the increase of the last century, after it reaches 9-10 billion, it will become stable. It is difficult to look into the future further, because it is impossible to anticipate human development.