The Minnesota D-N-R says the environmental impact statement for the proposed PolyMet mine is adequate and the permitting process can move forward, but environmentalists warn many key questions remain unanswered. Aaron Klemz with Friends of the Boundary Waters Wilderness says, for example, the amount of money that PolyMet would have to put up before they could start mining has never been resolved. Governor Mark Dayton says he wants financial assurances from PolyMet in case anything were to go wrong. Dayton says, “I want to make sure it’s rock-solid that the people of Minnesota are not gonna be on the hook in 20 years from now or 50 years from now.” Backers say a thorough review has found the PolyMet project won’t damage Minnesota’s environment. Lawsuits are expected from groups trying to block the project.