The world’s population exceeded 4 billion in 1974.
- World population – Wikipedia
In demographics, the world population is the total number of humans currently living, and was estimated to have reached 7.7 billion people as of November 2018. It took over 200,000 years of human history for the world’s population to reach 1 billion; and only 200 years more to reach 7 billion.
- World population milestones – Wikipedia
Six billion. The United Nations Population Fund designated 12 October 1999 as the approximate day on which the world population reached six billion. It was officially designated The Day of Six Billion.
- World Population Milestones – Infoplease
Find a list of world population milestones, from when it reached 1 billion in … Find a list of world population milestones, from when the total world’s population reached 1 billion in 1804 to 7 billion in 2011. … 4 billion in 1974, (14 years later).
- World Population Growth Through History – Annenberg Learner
Unit 5: Human Population Dynamics // Section 4: World Population Growth Through … society, so it took until 1804 for the human population to reach one billion.
- World Population Growth – Our World in Data
Time it took for the world population to increase by one billion … natural population growth is slightly negative: the number of deaths exceed the number of births.