as resources run out, it will eventually be cheaper to 'mine'landfill sites than to try and extract rare resouirces on an industrial scale, for high value assets like heavy metals
it is in sane to creat poisonous landfill sites; all waste should be sorted and redirected as efficiency and expediency requires; for example all biodegradble waste can be composted, all batteries can be cost-effectively recycled, bottles can be reused and aluminium is to valuable to bury