The materials and quantities of said materials, needed to make solar panels, are dug up from the ground, mines are not very safe.
adjective: said
1. used in legal language or humorously to refer to someone or something already mentioned or named.
Clearly this is the wrong place for this discussion. Is there a right place to discuss it, from a linguistic/sociological/stylistic point of view? Not that I really should... I'm just trying to avoid an unpleasant task that I really ought to be doing.
The first place that springs to mind is https://english.stackexchange.com/
I've seen other forums with good quality contributions on topics like this, I think one of them was for people speaking English as a second language looking for advice from native speakers. The name eludes me at the moment but if I come across it again I'll respond here with it.