Carved into a mountain range in Arizona’s Sonoran Desert, where temperatures often reach 118F (48C), a vast mining complex more than a century old is on the front lines of a race to unlock millions of tons of copper. After 154 years of digging at Morenci, all the easily recoverable copper has been mined. Left behind are towering piles of waste rock … Continue reading #MAMA (Make America Mine Again) – An American Mine Still Has Millions of Tons of Copper, If Companies Can Get to It.