How did human population change in 2025?

Scientists have built a high-resolution global map, which predicts the change of human population from now until 2025.

The Future Map Project - a partnership between Dai Columbia (USA), Hunter University and International Population Action Organization - differs from traditional population density maps in that instead of predicting the number of residents Each country, it extrapolates the population in each of the 9 million squares on earth.

This map can be an important tool for those who need to know where people will live and in what quantity, from conservationists to meteorologists, ecologists and economists.

The research team, led by Stuart Gaffin, has mapped the data from two sources: Predicting population distribution for 1990 and 1995, the UN forecast for 2025.

Scientists built two models and loaded the 1990 and 1995 data into it. The model will calculate the population forecast for each of the 9 million squares, referring to the value of the United Nations' 2025 national forecast.

Finally, the team selected more reliable forecasts from each model for each country.

The final results show that population growth is common in developing countries. Moreover, the number of people living within 90 km of the coastline is expected to increase to 2.75 billion people, an increase of 35% since 1995.

"With growing concerns about sea level rise and the strength of global warming storms, such forecasts are very important for making policy decisions and feasibility studies. vulnerability, " Gaffin said.

The map also shows a significant decline in population density in most of Japan, southern Europe and eastern Europe.

This result is well known through analysis of the population, Gaffin said, but the new map places changes in the pure geographic context.

T. An