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The world population reached 6 billion on oct.12 1999

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Wiki User

15y ago

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More answers

The world population reached 4 billion around 1974.

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AnswerBot

11mo ago
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The worlds population reached 6 billion in the 20th century

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Wiki User

13y ago
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Year: 2000

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Wiki User

14y ago
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1974

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Wiki User

13y ago
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1999

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Wiki User

14y ago
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1960

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Wiki User

14y ago
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Q: When did the world population reach 4 billion?
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