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Many studies have tried to estimate the world's sustainable population for humans, that is, the maximum population the world can host. [5] A 2004 meta-analysis of 69 such studies from 1694 until 2001 found the average predicted maximum number of people the Earth would ever have was 7.7 billion people, with lower and upper meta-bounds at 0.65 and 9.8 billion people, respectively.
There is a need to develop renewable energy resources. Humans everywhere must understand that rapid population growth damages the Earth's resources and diminishes human well-being." [171] [172] Growth in food production has been greater than population growth.
Minimum viable population (MVP) is a lower bound on the population of a species, such that it can survive in the wild. This term is commonly used in the fields of biology, ecology, and conservation biology.
The immense technological improvements of the past 100 years—in applied chemistry, physics, computing, genetic engineering, and more—have further increased Earth's human carrying capacity, at least in the short term. Without the Haber-Bosch process for fixing nitrogen, modern agriculture could not support 8 billion people. [45]
"We can think of Earth as a human body, and the planetary boundaries as blood pressure. Over 120/80 does not indicate a certain heart attack but it does raise the risk," Richardson said.
— BBC Horizon (2009), How Many People Can Live on Planet Earth In 2019, the Population Control Bill, 2019 bill was introduced in the Rajya Sabha in July 2019 by Rakesh Sinha . The purpose of the bill is to control the population growth of India.
An archaeological site in Ethiopia has revealed that a population of humans survived the eruption of Sumatra’s Mount Toba 74,000 years ago. One of the largest eruptions in Earth’s history ...
Therefore, the worldwide human population density is 8 billion ÷ 510 million km 2 (197 million sq mi) = 15.7 people/km 2 (41 people/sq mi). If only the Earth's land area of 150 million km 2 (58 million sq mi) is taken into account, then human population density increases to 53.3 people/km 2 (138 people/sq mi).