Also see, conversely, 'Out with the silver, in with the copper: A new boost for solar cell production' - https://news.ycombinator.com/item?id=32688307 - about new technologies allowing the replacement of silver with copper, replacement sought for reason of price and scarcity. Paradoxically, /minor/ price and scarcity.
[+] [-] mdp2021|3 years ago|reply