Rha Chapter 2 - The world's urban population in 1950 of just 746 million has increased to 3.9 billion in the decades since.[2] In 2009, the number of people living in urban areas (3.42 billion) surpassed the number l

66.66% Rha / Chapter 2: The world's urban population in 1950 of just 746 million has increased to 3.9 billion in the decades since.[2] In 2009, the number of people living in urban areas (3.42 billion) surpassed the number l

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