I saw this one the other day in a parking lot. No idea what it was about, but I thought it was odd that a football helmet would be on an anti-mining sticker. When I finally got around to googling it, I learned that the mine was stopped 18 years ago, when then-Governor Tommy Thompson signed a moratorium on mining. Then the area tribes stopped it forever by purchasing the land.
Given the weather up here, it's strange to see a vintage bumper sticker riding on a car in nearly mint condition.