Neither the article nor the comments here (so far) address the implication that this project would turn one of our most beautiful national parks into an industrial site.
Of course, they're also a huge technical challenge, and their feasibility is questionable, but that shouldn't stop us from at least investigating and researching the issues.
I wonder if this would be a good case to try various concepts for including nature in our engineering design. How much could we ensure is zero emission, mostly underground, and reducing impact to plants and animals.