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Carrying capacity is not a fixed number. Estimates put Earth's carrying capacity at anywhere between 2 billion and 40 billion people.

en.wikipedia.org/wiki/Carrying_capacity

The carrying capacity of a biological species in an environment is the maximum population size ... The application of the concept of carrying capacity for the human population has been criticized for not successfully ... the use of fossil fuels has been alleged to artificially increase the carrying capacity of the world by the use of ...

worldpopulationhistory.org/carrying-capacity

In other words, there is a carrying capacity for human life on our planet. Carrying capacity is the maximum number of a species an environment can support ...

www.livescience.com/16493-people-planet-earth-support.html

Oct 11, 2011 ... Humans' unquenchable urge to reproduce, Malthus argued, would ... Many scientists think Earth has a maximum carrying capacity of 9 billion ...

www.realclearscience.com/blog/2012/04/human-carrying-capacity.html

Apr 12, 2012 ... Last year, the world population reached 7000000000. At the time, the media and blogosphere briefly erupted in a war of editorials arguing ...

www.populationconnection.org/carrying-capacity-earth

Apr 13, 2017 ... The carrying capacity estimates of 94 scientists range from 500 million to 1 ... Another reason nobody knows the upper limit for the human ...

science.howstuffworks.com/environmental/green-science/earth-carrying-capacity1.htm

Learn why estimates of the Earth's carrying capacity vary so widely and find out what the ... If humans were still in the hunter-gatherer mode, Earth would have reached its ... Because people in different parts of the world are consuming different ...

thinkprogress.org/were-beyond-earth-s-carrying-capacity-now-will-accelerating-climate-change-turn-the-population-boom-36c4712743ad

Oct 15, 2011 ... Demographers are predicting that world population will climb to 10 billion later this century. ... We're Beyond Earth's Carrying Capacity Now. ... trends will have any impact on the number of human beings the planet sustains?

www.econ.yale.edu/~nordhaus/homepage/documents/CohenScience_carrying_cap.pdf

human population growth and human carrying capacity can account for ... 15% of people in the world's riphest coun- ... Today, the world has about 5.7 billion.

na.unep.net/geas/archive/pdfs/GEAS_Jun_12_Carrying_Capacity.pdf

Jun 8, 2012 ... of the human population but now some people have experienced a tripling .... Figure 2: Estimates of Earth's carrying capacity vary dramatically as this survey of 65 different ... to revisit the Limits to Growth and “world modeling”.