Question

guided practice
which deadly poison is released into the environment during heap leaching?
a. lead
b. sulfur dioxide
c. arsenic
d. cyanide

Explanation:

Heap leaching is a mining technique primarily used to extract gold and silver, where a cyanide solution is percolated through ore piles to dissolve the target metals. This process can release cyanide into the surrounding environment, posing a deadly toxic risk. Lead, sulfur dioxide, and arsenic are not the primary toxicants released by this specific method.

Answer:

D. cyanide