Environmental

A Montana property near Anaconda may have elevated arsenic levels in the soil due to:

ANatural volcanic activity
BHistoric copper smelter operations that deposited arsenic-laden stack emissions over a wide area✓ Correct
CAgricultural fertilizer runoff
DHighway salt application

Explanation

The historic Anaconda Copper Mining smelter released arsenic, lead, and other heavy metals into the environment over decades of operation. The surrounding area is part of the Anaconda Smelter Superfund site, one of the largest in the nation.

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