Knowledge expansion: World population refers to the total population of the world (earth) at a certain moment. According to the US Census Bureau, as of 20 13, 1.4, there are 7.057 billion people in the world. According to the data of the US Census Bureau, the global population exceeded 7 billion in March 20 12. According to the United Nations Population Fund, the global population will reach 7 billion in 20 1,1,3 1, 20 14 years. In 20 16, the world population reached 7262306342(72623 1 000).
The world population has been increasing since the Black Death and the Great Famine in Europe in 1950s, when it was about 370 million. Subsequently, due to factors such as war, the growth rate was sometimes fast and sometimes slow. After the end of World War II, from 1960s to 1950s, due to the decrease of factors (such as wars and famines) that caused the population growth to slow down, the world population growth rate obviously accelerated-exceeding 1.8% every year. This state continued until 1970. From 65438 to 0963, the world population increased by 2.2%, reaching a historical peak. Subsequently, with the development of economy, people's concept of fertility has changed, and the population growth rate has gradually declined. 20 1 1 The annual world population growth rate is about 1. 1%. It is estimated that by 2040, the world population will reach 8 billion.