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Explaining processes in physical geography

Seven billion and counting

This article looks at reasons for global population change and investigates regional variations

The world’s population is growing quickly and on 31 October 2011 it reached 7 billion, although no one knows exactly where or when on that day this number was reached.

Current projections show a steady decline in the rate of population growth but a continuing increase in the world’s total population, reaching 8 billion by around 2025. By 2045–50 the total is expected to reach around 9 billion.

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Explaining processes in physical geography

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