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population growth

Sun, 2005-12-04 00:55 — bklasky

Some interesting statistics on World Population:

In the 19th century, global population grew by only 600 million, but in the 20th century it grew by 4.4 billion. There are twice as many people today as there were in 1960. One tenth of all the people who have ever lived are alive today. There has been more growth in population since 1950 than during the 4 million years since our early ancestors first stood upright.

World population reached:

  • 1 billion in 1804,
  • 2 billion in 1927 (123 years later)
  • 3 billion in 1960 (33 years)
  • 4 billion in 1974 (13 years)
  • 5 billion in 1987 (12 years)
  • 6 billion in 1999 (12 years)
  • 7 billion in 2013 (14 years - projected)
  • 8 billion in 2028 (15 years - projected)
  • 10.7 (high) or 8.9 (middle) or 7.3 (low) billion projected for 2050

    • The average life expectancy is 61, up from 40 in just 50 years. The numbers of people 65 and older make up 10-15% of the world population today and is expected to increase to 20-30% by 2050. If fertility remained at current levels, the population would reach the absurd figure of 296 billion in just 150 years.

    Source: www.overpopulation.org