The process of mining bauxite is highly destructive to the surrounding environment. It is usually strip-mined, as it is almost always found near the surface of terrain, with little or no overburden.
No, bauxite is very low value – $30 to $50 a tonne sorta stuff. Therefore you always mine the surface stuff because there’s not enough money in the game to pay for lifting deeper deposits.
You strip mine because the damn stuff’s near everywhere and thus cheap as chips.