Oh, the tears of eldritch horrors? Yeah, those are technically a renewable resource. -- RecklessPrudence
"They weigh a third of a ton each, they're pure crystal and, when struck, emit an energy that can be harnessed by a sphere of aluminium. I mean, in the 1800's, that was impossible, but now..."
"Aluminium is everywhere. I get it. So how much energy can we extract from one of these things?"
"Uh... probably about 100 terawatts per tear."