Monday, December 27, 2010

POPULATION GROWTH

POPULATION GROWTH

Improvement in food supply and advanced in medicine have both played a major role in the remarkable growth in global population which has increased five fold over the last 150 years . Food supplies have risen with the mechanization of agriculture and improvements in crop yeilds . Better nutrition together with higher standards of public health and sanitathion have led to increased longevity and higher birth rates .

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