Black rocks in Sudbury, Ontario, Canada. The rocks were stained black by early smelter emissions, which contained sulphur dioxide and metal particula

---

Black rocks in Sudbury, Ontario, Canada. The rocks were stained black by early smelter emissions, which contained sulphur dioxide and metal particulate. When mixed with air moisture, form acide rain that corroded the rock.

---

Size: 4592px × 3064px
Photo credit: © picturelibrary / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: black, canada, ontario, rocks, stained, sudbury