INSIGHT-Massive copper mine tests Trump's push to slash regulation
July 13, 2017 at 01:00 AM EDT
SUPERIOR, Arizona, July 13 (Reuters) - Rio Tinto's proposed Resolution Copper Mine in Arizona would tunnel 7,000 feet underground, where rocks radiate heat from the earth’s molten core. It would suck up enough water to supply a city and leave a crater a mile and a half wide and 1,000 feet deep.