The main sources of lead, mercury and arsenic water pollutants are
A) electric power plants
B) inclined landfills, household chemicals, mining refuse and industrial discharges
C) sewage and inorganic fertilizers
D) runoff from streets and parking lots
E) land erosion from farms that have used chemical insecticides

Question

Quizplus · Accepted Answer

Inclined landfills, household chemicals, mining refuse and industrial discharges are major sources of lead, mercury and arsenic water pollutants. Electric power plants also contribute to pollution, but are not the main sources. Sewage and inorganic fertilizers primarily contribute to nutrient pollution, rather than heavy metal pollution. Runoff from streets and parking lots can contain heavy metals, but generally not in significant enough amounts to be a major source. Land erosion from farms using chemical insecticides may contribute to heavy metal pollution, but again, it is not a primary source.

The Main Sources of Lead, Mercury and Arsenic Water Pollutants