https://www.hi.no/en/hi/temasider/ocean-and-coast/mining-was...
Consider that for every kilogram of usable Lithium we extract we need 170KG of raw ore which requires us to remove 1600KG of material. With Platinum we are moving 670,000KG to get a kilo of the metal. The waste vastly outweighs the end product but the end product is where the money is so we know little about the waste aside from that it needs to be disposed of.
That's not entirely true:
https://www.hi.no/en/hi/temasider/ocean-and-coast/mining-was...
> Dumping large quantities of sand and other material will have a big impact on fauna living at the bottom of the sea, and it may even completely wipe out existing ecosystems at the marine disposal site itself.