Mari0aaayunise Mari0aaayunise
  • 23-02-2017
  • Health
contestada

Black lung disease is most commonly a result of _________.
a. strip mining
b. mountaintop removal
c. underground mining
d. oil refining

Respuesta :

Loquita253
Loquita253 Loquita253
  • 23-02-2017
Black lung disease is most commonly a result of underground mining. 
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