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Topsoil runoff from farm, central Iowa (2011)
Topsoil runoff from farm, central Iowa (2011)
Dead zone in the Gulf of Mexico
Dead zone in the Gulf of Mexico
The Hyperion Water Reclamation Plant serves the Los Angeles metropolitan area.
The Hyperion Water Reclamation Plant serves the Los Angeles metropolitan area.
Parking lots, roads and buildings are major sources of urban runoff.
Parking lots, roads and buildings are major sources of urban runoff.
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Runoff of soil and fertilizer during a rain storm
Runoff of soil and fertilizer during a rain storm
Contour buffer strips used to retain soil and reduce erosion
Contour buffer strips used to retain soil and reduce erosion