How one startup is recovering copper from old mines that were left for dead in the 1980s

How one startup is recovering copper from old mines that were left for dead in the 1980s →

In central Arizona, about 90 miles east of Phoenix, an old open-pit copper mine sits full of water. The mine closed in the 1980s, left to accumulate rain and groundwater. These “pit lakes,” as they’re called, are monitored so that they don’…