User: alkhul

Re:Have we run out of imagination as well?

On: We Might Not Have Enough Materials for All the Solar Panels and Wind Turbines We Need, an Analysis Finds (popularmechanics.com)

Believe it or not, the US government has had this concern for a while now and is trying to do something about it:
https://cmi.ameslab.gov/
https://cmi.ameslab.gov/materi...