> considering they move and crush maybe 1000 or 10000 kgs of rock for every kg of metal This is more or less what I visualize if I get weary of recycling bits

> considering they move and crush maybe 1000 or 10000 kgs of rock for every kg of metal This is more or less what I visualize if I get weary of recycling bits of metal (bottle caps, aluminum foil, ...).