wetland removal.
http://files.dnr.state.mn.us/lands_minerals/northmet/permit_to_mine/appendix_18_1_wrp_attachment_d-1.pdf
How can the DNR conceivable assure that the water resources that the project
is going to destroy during a few decades of mining will be repaired or
replaced?
http://www.dnr.state.mn.us/polymet/permitting/ptm.html
Here's what a once prosperous fishing area in Bolivia, downstream from a mining
project, looks like.
https://www.theguardian.com/world/2018/jan/04/the-ecological-catastrophe-that-turned-a-vast-bolivian-lake-to-a-salt-desert