During the twentieth century, the human population exploded, entering into an exponential growth phase. The principal reason for this explosion is

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    better nutrition.
     better maternity and infant care.
     improved medical care, freeing humans from the limitations of their natural enemies, especially diseases, and effectively reducing death rates.
     genetic adaptation within the human population, allowing for longer potential life spans.
asked Jun 25, 2012 in Environmental Science by anonymous
    

1 Answer

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improved medical care, freeing humans from the limitations of their natural enemies, especially diseases, and effectively reducing death rates.
answered Jun 26, 2012 by Geodude ~Top Expert~ (9,680 points)



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