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World population has been rising continuously since the end of the Black Death, around the year 1350. [72] The fastest doubling of the world population happened between 1950 and 1986: a doubling from 2.5 to 5 billion people in 37 years, [73] mainly due to medical advancements and increases in agricultural productivity.
The current world population growth is approximately 1.09%. [5] People under 15 years of age made up over a quarter of the world population (25.18%), and people age 65 and over made up nearly ten percent (9.69%) in 2021. [5] The world's literacy rate has increased dramatically in the last 40 years, from 66.7% in 1979 to 86.3% today. [13]
In 2011, as the world's population passed the seven billion mark, Ehrlich argued that the next two billion people on Earth would cause more damage than the previous two billion, as humans now increasingly would have to resort to using more marginal and environmentally damaging resources. [37]
In the first scenario, where the world is expected to continue to develop economically in a similar way to the last 50 years, researchers estimate the global population could peak at 8.6 in 2050 ...
Estimates of world population by their nature are an aspect of modernity, possible only since the Age of Discovery.Early estimates for the population of the world [10] date to the 17th century: William Petty, in 1682, estimated the world population at 320 million (current estimates ranging close to twice this number); by the late 18th century, estimates ranged close to one billion (consistent ...
Currently, 757 million humans live in the 101 largest cities; [41] these cities are home to 11% of the world's population. [41] By the end of the century, the world population is projected to grow, with estimates ranging from 6.9 billion to 13.1 billion; [41] the percentage of people living in the 101 largest cities is estimated to be 15% to 23 ...
The majority of world population growth today is occurring in less developed countries. According to United Nations population statistics, the world population grew by 30%, or 1.6 billion humans, between 1990 and 2010. [39] In number of people the increase was highest in India (350 million) and China (196 million).
Celebrate Earth Day 2024 with these inspiring sayings about honoring nature and the environment. Share famous quotes from world leaders, activists and writers.