if energy is a problem then surely we'd just build global recycling plants at geothermal hotspots? it's not like shipping is a problem. the sense I get is that the main bottleneck with recycling isn't energy, but labour. handling and sorting rubbish properly is tedious and unpleasant and the west doesn't want to spend the money that its workers would expect for it

tangentially--and I'm aware this sounds incredibly stupid, and I'm sure it is--but on the topic of geothermal hotspots, what is the downside of finding some lava/magma source deep, deep underground and just dumping rubbish in there? surely most of the fumes would just be absorbed before they reach the surface? is it just too expensive of an idea/has it been done/is it likely to have undesirable long term side-effects/do we simply not have safe access to such things