Many mining sites look really desolate and alien. If you carve a hole into solid rock, the crushed rock doesn't fit into that same space anymore. You will have

Many mining sites look really desolate and alien. If you carve a hole into solid rock, the crushed rock doesn't fit into that same space anymore. You will have rubble piles. Also all kinds of substances start leaching from it. What was just inert rock is now mining waste. Basically you can easily poison nearby water bodies. And this isn't even talking about any kind of extraction, just the physical action. Why single out the smart phones?