to similar conditions.
Elbow analyzes world population growth and distribution and shows rates of natural growth and regional differences in growth rates. The most rapidly growing areas are found in Africa and the Middle East, with a few such areas in Central and South America. These areas will have their population doubled in about one generation. Many countries with such rapidly growing populations are among the world's poorest, while many of the slow-growing countries are among the world's richest. Different means of analyzing such issues have been used, and Elbow notes how social scientists have developed a model known as the Demographic Transition Model to do just that. The model
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