Controversy surrounds Minnesota sulfide mining proposal

Opponents of a proposed mining project in northern Minnesota say they have collected over 12,600 signatures from all 87 Minnesota counties, demanding transparency from the mining companies and Minnesota's governor to protect the environment and taxpayer money.

The controversy has been ongoing for over five years and escalated recently when state regulators found that the copper-nickel mine would cause water pollution that would require 500 years and billions of dollars to clean up.