I cannot put a source to it but I remeber to have heard the ash landfills (that are hermetically sealed) are designed to be resource deposites once they are ful

I cannot put a source to it but I remeber to have heard the ash landfills (that are hermetically sealed) are designed to be resource deposites once they are full. It does not make sense to recycle the involved metals etc. while its almost empty but should be worthwile once a large deposite is established.