dec 6, 1804 - Dates we reached 1, 2, 3, 4, 5, 6, and 7 billion humans

Description:

1 Billion 1804, 2 Billion 1927, 3 Billion 1960, 4 Billion 1974, 5 Billion 1987, 6 Billion 1999, 7 Billion 2011.

Added to timeline:

19 Oct 2018

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Environmental Biology

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