| POLLUTANT | SOURCES | PROBLEMS | |
|---|---|---|---|
| A G R I C U L T U R A L R |
U.S. Department of the Interior, U.S. Geological Survey
URL: http://pubs.usgs.gov/of/1998/of98-805/lessons/chpt5/ar-chart.htm
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Last modified: 10:44:36 Wed 17 Oct 2001
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