A haze can be seen at night hovering over the Asarco copper smelter, which turns copper ore into nearly pure copper bars. Emma Schwartz/Center for Public Integrity hide caption

toggle caption Emma Schwartz/Center for Public Integrity
EPA Takes Action Against Toxic Arizona Copper Plant
  • Download
  • <iframe src="https://www.npr.org/player/embed/142439081/142437998" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript