Minnesota Public Radio slideshow:
Rain gardens seen as key to cutting pollution
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Charlene Johnson is building rain gardens at the waste water treatment plant in Superior, Wisconsin. The plots are designed to show homeowners how they can help prevent pollution from washing into Lake Superior. (MPR Photo/Stephanie Hemphill)

Charlene Johnson is building rain gardens at the waste water treatment plant in Superior, Wisconsin. The plots are designed to show homeowners how they can help prevent pollution from washing into Lake Superior.

(MPR Photo/Stephanie Hemphill)
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