I´ve always thought that someday there would be a way to use old dumpers (or even actual ones, although some of them have a good recycle system) as a source of

I´ve always thought that someday there would be a way to use old dumpers (or even actual ones, although some of them have a good recycle system) as a source of raw materials. After all there are some decades of waste accumulation there and proper recycling is relatively recent. It could be a new kind of mining. I don´t know the composition data on old garbage, so maybe is not worth the effort. For example I imagine that iron and copper was well recycled and reused even 100 years ago.