How does the Cyanide heap leaching process work and what are the potential impacts to the environment?

Answered by Bonnie Gestring – Northwest Program Director for EARTHWORKS Cyanide leach mining is a type of gold mining that uses cyanide to extract gold from the surrounding rock. First, the rock that contains gold (the ore) is dug out of the ground, leaving behind a large open pit. Then, the ore is crushed into…