Point 4 is mostly confined to old abandoned sites, as mentioned in your link. Modern tailings aren’t left to leach acid all over the place, at least not in North American mines. I get that all bets are off in eg Africa, however.
Sure, but a lot of surface exploitation is planned globally. Africa and Asia are certainly going to be seeing new mines opening due to demand for solar/batteries.
For sure, I was taking issue with the absoluteness of the assertion that all terrestrial mines are leaching from their tailings piles/ponds. It’s not true of many (most?) modern mines.