NBC station on June 18 led the United Nations report to predict that the world population will increase to 10.9 billion by the end of the 21st century, leading to concerns about an increase of more than 3 billion people will deplete resources and speeding up climate change.

From the current 7.7 billion people, the population growth rate is expected to continue despite the birth rate declining from an average of 3.2 children / woman in 1990 to 2.5 children / woman in 2019 .

Experts predict that the population will increase to 9.7 billion by 2050.

The latest report predicts lower population growth than the previous report released by the United Nations in 2017, when forecasting the world population will reach 11.2 billion by the end of the century.

The revised figure shows a declining tendency to birth, which means that more and more countries are facing population decline.

By region, the population is the strongest in sub-Saharan Africa, with the population doubling over the next 30 years.

Besides, the current Indian population of 1.339 billion is expected to surpass China by 2027. The population of China could increase to 2.2% by 2050 compared to the current 1.43 billion people.

In the next 30 years, 54 countries will have a declining population, including Japan, Ukraine, Bulgaria and Lithuania. The US population is expected to increase to 434 million by the end of the century, compared with 329 million in 2019, most of which comes from immigrants.

The US population is expected to increase to 434 million by the end of the century, compared with 329 million in 2019, most of which comes from immigrants.

Scientists are also concerned about the impact of population on climate change.

"Our impact on climate is related to population in many ways, human resources, industrial production scale, energy needed for heating, cooling and transportation," said Amy. Snover, director of the Climate Impact Group at the University of Washington.

“All of this affects greenhouse gas emissions. Therefore, the more crowded and more resourceful people use, the more difficult it is to cope with the risks and impacts of climate change, ”said Ms. Snover.