World Population

Over the past several centuries the number of people living on the planet has increased over and over. By 2000, the population on Earth will be ten times as much as 300 years ago. How fast the population will grow. I think about my family line. There are two parents at the top, and there are children under it. Below these children are the children they own. As long as your family continues to breed, genealogies will continue to increase, and will increase for each generation.

After the world population growth rate exceeded 400% in the 20 th century, the population growth rate sharply decelerated. The fastest population growth rate in the world has reached the second half of the 1960s and has since declined. In the latter half of the 1960s, the world's population increased 2% per year, but now it has slowed down to about 1%. There are three main determinants of population growth in the world: mortality, birth rate and population growth. Worldwide mortality reduction - an increase in life expectancy worldwide and a decrease in child mortality in all countries - contributes to the increase in world population. On the other hand, the decrease in birth rate - the number of children per woman - has reduced population growth. Until the end of the 1960s, the world's average birthrate is five children per woman, and since then it has halved.

The figure of "The future of world population growth" shows three scenarios concerning the change of demographics according to the level of the birthrate. By 2025 the world's population will increase to 8 billion, estimated to reach 2 billion by 2050. This is because we reach a moderate situation of 0 children per woman. Most of the world's population growth can continue to exist in developing countries. Asia will continue to occupy the majority of the world's population, and Africa will gain greater market share than it is now. According to mild forecasts, the population of these areas will nearly double by 2050. By 2050, nearly 90% of the world's population may live in countries currently considered to be underdeveloped, and today it is about 80%.