In Addition to Lowering the PH of Nearby Streams, Which

Multiple Choice

In addition to lowering the pH of nearby streams, which of the following is an environmental problem associated with acid mine drainage?

A) release of heavy metals into the environment
B) erosion of mining tunnels causing land subsidence
C) chemical burns of workers due to presence of alkaline minerals
D) increased runoff leading to more frequent flooding
E) acidic runoff causes aquifer materials to dissolve