Minnesota Public Radio slideshow:
Part 3: The politics
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MPCA researcher Fardin Oliaei is collecting soil samples at the Washington County landfill, where 3M used to dispose of chemical wastes.  (MPR Photo/Sasha Aslanian)

MPCA researcher Fardin Oliaei is collecting soil samples at the Washington County landfill, where 3M used to dispose of chemical wastes.

(MPR Photo/Sasha Aslanian)
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