Describe in brief the different trends of population growth in the world from an early period to the present day.

The different trends of population growth in the world from an early period to the present day are as follows:

  1. In the early periods of history i.e., 8000 to 12000 years ago the populations grow at a slow rate. The population of the era was8 million.
  2. The count of the population in the first century was below 300 million.
  3. By 1600 AD world population increased to 0.5 billion as expansion in trade and industrial revolution increased settlements.
  4. World population touched 1 billion in 1830 due to advancement in the field of science and technology.
  5. In the next 100 years i.e. 1930, the population doubled to 2 billion due to improved medical, health and sanitation facilities.
  6. In 1960, the population was 3 billion, in 1975, it was 4 billion after that one billion is added in every 12 years.
  7. There is a great variation among regions in doubling their population.

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