Environmental Engineering Reference
In-Depth Information
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The amount of water on the Earth is constant. What changes is
the form it takes—liquid, ice, or vapor; the degree of its purity;
whether the pollution is natural or man-made; and the accessi-
bility of that water.
Fields in the Midwest and West that once produced abundant
crops are parched and dry today as aquifers—underground water
supplies—are drawn down and their supplies of water depleted.
One aquifer in trouble in some areas is the vast High Plains, which
includes the Ogallala aquifer.
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NOTES
1. World Health Organization, “Water, Sanitation and Hygiene Links to Health,”
http://www.who.int/water_sanitations_health/publications/facts2004/en/
index.html; World Health Organization, “Water, Sanitation and Hygiene Links
to Health: Facts and Figures--updated November 2004,” http://www.who.int/
water_sanitation_health/factsfi gures2005.pdf.
2. Ibid.
3. Peter H. Gleick, “Dirty Water: Estimated Deaths from Water-Related Diseases
2000-2020” (August 15, 2002), Pacifi c Institute for Studies in Development,
Environment, and Security, http://pacinst.org/reports/water_related_deaths/
water_related_deaths_report.pdf.
4. 2007 World Water Day, “Frequently Asked Questions,” http://www.unwater
.org/wwd07/faqs.html.
5. U.S. Environmental Protection Agency, “Drinking Water: Where Does My
Water Come From,” http://epa.gov/region07/kids/drnk_b.htm.
6. U.N. World Health Organization, Regional Offi ce for South-East Asia, “Arsenic,”
http:
//
searo.who.int/LinkFiles/Health_Topics_intro.pdf.
7. National Aeronautics and Space Administration Jet Propulsion Laboratory,
California Institute of Technology, “GOES Weather Quiz: Explanations of the
Answers,” http://spaceplace.nasa.gov/en/educators/weather-quiz.pdf.
8. U.S. Geological Survey, “The Water Cycle,” http://ga.water.usgs.gov/edu/
watercyclesummary.html.
9. U.N. General Assembly (A/55/1000), letter dated June 25, 2001 from the
Secretary-General to the President of the General Assembly, http://un.org/
esa/ffd/a55-1000.pdf; UN News Centre, press release, “General Assembly
Declares Access to Clean Water and Sanitation Is a Human Right,” July 28, 2010,
http://un.org/apps/news/story.asp?NewsID=35456&Cr=sanitation&Cr1.
10. Science@NASA, “All the World's a Stage . . . for Dust,” June 26, 2001, http://
science.nasa.gov/headlines/y2001/ast26jun_1.htm; “Dust Begets Dust,” May
