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Physics professor Albert Allen Bartlett at the University of Colorado Boulder warned in 2000 that overpopulation and the development of technology are the two major causes of the diminution of democracy. [181] However, over the last 200 years of population growth, the actual level of personal freedom has increased rather than declined. [136]
year world population (millions) -10000 4 -8000 5 -7000 5 -6000 5 -5000 5 -4000 7 -3000 14 -2000 27 -1000 50 -750 60 -500 100 -400 160 -200 150 1 170 200 190 400 190 500 190 600 200 700 210 800 220 900 226 1000 310 1100 301 1200 360 1250 400 1300 360 1340 443 1400 350 1500 425 1600 545 1650 470 1700 600 1750 790 1800 980 1850 1260 1900 1650 1910 1750 1920 1860 1930 2070 1940 2300 1950 2400 ...
The table below shows annual population growth rate history and projections for various areas, countries, regions and sub-regions from various sources for various time periods.
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Image title: This svg graphic is to edit with an text editor. Please do not overwrite this file by saving with an image editor. ----- All values are scaled by 1000. This is necessary to keep the lines from turning into ribbons. Width: 750: Height: 450
The national 1 July, mid-year population estimates (usually based on past national censuses) supplied in these tables are given in thousands. The retrospective figures use the present-day names and world political division: for example, the table gives data for each of the 15 republics of the former Soviet Union, as if they had already been independent in 1950.
All of the above are looked at over space and time. Population geography also studies human-environment interactions, including problems from those relationships, such as overpopulation, pollution, and others. [3] A few types of maps that show the spatial layout of population are choropleth, isoline, and dot maps.
The 2022 projections from the United Nations Population Division (chart #1) show that annual world population growth peaked at 2.3% per year in 1963, has since dropped to 0.9% in 2023, equivalent to about 74 million people each year, and could drop even further to minus 0.1% by 2100. [5]