From a global perspective, the largest contamination of surface waters is due to
A) domestic sources (sewage)
B) manufacturing
C) mining
D) agriculture
E) spills from oil tanker
Correct Answer:
Verified
Q5: Arrange the zones of the open sea
Q6: At very low dissolved oxygen (DO) levels
Q7: Cold, clear lakes or streams with few
Q8: Discharge of one or more water pollutants
Q9: Eutrophication is the
A)overgrowth of algae in lakes
Q11: Groundwater (from wells), unlike surface water, can
Q12: Groundwater (from wells) may contain
A)salt from use
Q13: In a decomposition zone of water,
A)the DO
Q14: Lakes generally evolve naturally over time in
Q15: Lead enters drinking water primarily from
A)improperly discarded
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