Sooner or late were gonna have to get to round to the concept of enforcing manufacturers by law to also un-manufacture at the end of a products life, currently we can get away with not, because we live in a culture in which energy and materials, have been relatively cheaply raped from the earth, and twas always cheaper to take and make anew, rather than to un-manufacture. But in the future Un-Manufacturing plants will be more common place. As humans finally invent circular processes rather than linear ones.