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| Description: How many immigrants will we have? Will some devastating disease appear? Because of these many unknowns, demographers play it safe by making several projections of population growth, each depending on an “if” scenario. Figure 14.9 shows three projections of the U.S. population. Picture Stats: Views: 338 Filesize: 46.85kB Height: 537 Width: 722 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=27998 |