The new suit seeks unspecified damages. It also asks a judge to order "the surrender and destruction" of IMP products that may violate trademark rules.
A new University of Minnesota study found wetlands are providing a significant water quality benefit by keeping nitrates from crop fertilizer out of rivers.
Most of the cost is to fix aging or inadequate pipes and pumping systems. Stricter water quality regulations account for only about 5 percent of the funds needed.
The U.S. Forest Service announced Friday it will not prepare a full-blown environmental impact statement on a proposal to impose a 20-year mining ban in the watershed of the Boundary Waters.
The U.S. Forest Service says it's downgrading an environmental review of a proposal to withdraw certain national forest land in Minnesota from minerals exploration for up to 20 years.
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