this post was submitted on 29 Sep 2024
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Because the alternatives get better.
What alternatives at that scale?
Batteries and synthetic fuels?
Did you read the post you're replying to?
I find reading interferes with the posting
I don't think batteries are designed for the duration of storage you want a backup of pumped hydro for, and it will remain to be seen what a synthetic fuel industry looks like (and whether it would ever be cost competitive with pumped hydro at the places where pumped hydro is currently viable).