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| Description: It took twelve years to add the fifth billion to the world’s population—and also twelve years to add the sixth billion—and also twelve years to add the seventh billion? Despite millions upon millions of more women of childbearing age, population growth has leveled off. The New Malthusians reply that a slower growth rate still spells catastrophe—it will just take longer for it to hit. Picture Stats: Views: 347 Filesize: 61.77kB Height: 531 Width: 764 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=27985 |