From mines to megawatts: The promise of 'conflict-free Big Solar'

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Millions of acres of degraded terrain could hold 100 times the current US solar capacity - and avert the environmental tradeoffs of blockbuster solar projects

Arizona startup Green Energy Storage wants to transform an abandoned open-pit copper mine 45 miles south of Phoenix into a large-scale solar power and pumped-hydro storage facility. Although still in...

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