the earth's population reached 1 billion in 1804.
the earth's population reached 1 billion in 1804.
when did the earth's population reached 1 billion?
1804
section::::history.:milestones by the billions.









































it is estimated that the world population reached one billion for the first time in 1804. it was another 123 years before it reached two billion in 1927, but it took only 33 years to reach three billion in 1960. thereafter, the global population reached four billion in 1974, five billion in 1987, six billion in 1999 and, according to the united states census bureau, seven billion in march 2012. the united nations, however, estimated that the world population reached seven billion in october 2011.
world population
according to papers published by the united states census bureau, the world population hit 6.5 billion on 24 february 2006. the united nations population fund designated 12 october 1999 as the approximate day on which world population reached 6 billion. this was about 12 years after world population reached 5 billion in 1987, and six years after world population reached 5.5 billion in 1993. the population of countries such as nigeria is not even known to the nearest million, so there is a considerable margin of error in such estimates.
population