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In 1995, the U.S. had a population of about 267 million. Approximately
225 million people had their water delivered from a public-supply
system.
U.S. Geological Survey
The
biggest cause of water pollution in developing countries is sewage,
and its most important effect is on human health.
The Economist, March 21, 1998
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Throughout human history, the major problems of health that [people]
have faced have been concerned with community life, for instance,
the control of transmissible disease, the control and improvement
of the physical environment (sanitation), the provision of water
and food of good quality and in sufficient supply, the provision
of medical care, and the relief of disability and destitution.
George Rosen, A History of Public Health, 1993
Much
of the increase in Americans' longevity, from about 45 years in
the early 1900s to about 76 at present, and the decrease in infant
mortality, from about 100 per 1,000 in the early 1900s to 8.2 in
1992, is due to the use of modern water purification methods including
the use of chlorine.
James S. Todd, M.D., Executive Vice President, American Medical
Association, 1994
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