Oh and a note I neglected to make: the recycling failure scenarios are wildly different for steel and PET: steel is easily disposed of by the environment, and

Oh and a note I neglected to make: the recycling failure scenarios are wildly different for steel and PET: steel is easily disposed of by the environment, and doesn't really cause any problems, in fact it's a great oceanic fertilizer. PET is a horror show in the failure scenario.