Estimates of historical world population - Wikipedia
World History for Us All: Key Theme One
JRC: 76.5% of world's population in urban areas as of 2015 - Green Car Congress
Infographic: How the world's population tripled in 70 years | Infographic News | Al Jazeera
Human Population Through Time - YouTube
World population: how did it reach almost 8 billion people? | World Economic Forum
Visualizing the World's Population in 2020, by Age Group
How far will global population rise? Researchers can't agree
Population and environment: a global challenge - Curious
World population evolution | Historic growth and causes - Iberdrola
7 Billion and Counting: Roger-Mark on Global Population Concerns at Future of Nature Forum
Human Population Through Time - YouTube
World population growth is expected to nearly stop by 2100 | Pew Research Center
Human population and a sustainable future | Yale Environment Review
World population growth is expected to nearly stop by 2100 | Pew Research Center
demography | social science | Britannica
Human Population through time - N-IUSSP
World population growth is expected to nearly stop by 2100 | Pew Research Center
How far will global population rise? Researchers can't agree
Estimated 7.58B People on Earth on World Population Day July 11
World Population Growth - Our World in Data
