Equipped with both a biodigester to capture methane from hog waste and a system to spray what’s left of the feces and urine onto nearby farm fields, White Oaks Farm continues to pollute the surrounding environment.By Lisa SorgFREMONT, N.C.—On a chilly afternoon in early January, Samantha Krop, the Neuse riverkeeper, and Taylor Register, a water quality specialist, trekked along a ditch near White Oaks Farm in Wayne County.

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