Minnesota Public Radio slideshow:
Drainage ditches cause pollution; oversight is spotty
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Greg Roiger pushed to get the state buffer law examined. He sponsored a resolution adopted by the Minnesota Association of Soil and Water Conservation Districts. The resolution caught the attention of the state Legislature, which approved study money. (MPR Photo/Mark Steil)

Greg Roiger pushed to get the state buffer law examined. He sponsored a resolution adopted by the Minnesota Association of Soil and Water Conservation Districts. The resolution caught the attention of the state Legislature, which approved study money.

(MPR Photo/Mark Steil)
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