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Between 1650 and 1900 the number of persons on earth increased from 500,000,000 to 1,500,000,000 in 250 years.
60 years later, it became 3,000,000,000 in 1960. In 1962, it was expected that the figure will double to 6,000,000,000 in 2000. The prediction was good 39 years later with 6,082,966,429.
Between 1650 and 1900 the number of persons on earth increased from 500,000,000 to 1,500,000,000 in 250 years.
60 years later, it became 3,000,000,000 in 1960. In 1962, it was expected that the figure will double to 6,000,000,000 in 2000. The prediction was good 39 years later with 6,082,966,429.