evidence: Here are 11 key takeaways from the UN’s "World Population Prospects 2019": [...] Six countries are projected to account for more than half of the world’s population growth through the end of this century, and five are in Africa. The global population is expected to grow by about 3.1 billion people between 2020 and 2100. More than half of this increase is projected to come from Nigeria, the Democratic Republic of the Congo, Tanzania, Ethiopia and Angola, along with one non-African country (Pakistan). Five African countries are projected to be in the world’s top 10 countries by population by 2100. [...] Note: The UN projections for the future population are based on assumptions about likely future changes in key demographic indicators, including fertility, life expectancy and migration. There is uncertainty regarding specific estimates. This analysis uses the medium variant for future dates, which takes the midpoint of likely outcomes. For more information, see the full UN report, data tables and methodology.