Two9A

My leatherman was a little over a ton That thing must be huge!

In landfill, but not as raw material. If you didn’t already know how to make bronze, for example, you’d have a hell of a time making new bronze based on old contaminated remnants.

The argument has been made that, even if another intelligence arises in 100 million years, there are multiple problems for them: the Sun will be burning hotter by then, easily accessible raw material will all have been used up (Cyprus is no longer covered in surface-level raw copper, for example), we’ll probably irradiate the surface on our way out, etc.