Zombie mines, to be precise. As @MarkOlalde writes, these idled facilities throw "workers into limbo" and side-step "legally mandated, but costly, environmental cleanup" publicintegrity.org/environment/wh…
There, as @jaredtbennett explains, you might find Republican lawmakers on a free trip learning from a special interest group how to cut food benefits for the poor. publicintegrity.org/state-politics…
Comprehensive list, via @INN: inn.org/members/