Question

In _____________ the world’s population reached 1 billion.​

Answer 1

Answer:

It is estimated that the population of the world 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 rise by another billion people, reaching three billion in 1960.

Explanation:

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Answer 2

It is estimated that the population of the world reached one billion for the first time in 1804...