What is one of the leading causes of water quality problems?

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试卷: LEED GA模拟题C[查看]
What is one of the leading causes of water quality problems?
A: Sewage treatment
B: Pervious surfaces
C: Nonpoint source pollution
D: Brownfield redevelopment

参考答案: C

本题解释:
Nonpoint source (NPS) pollution, unlike pollution from industrial and sewage treatment plants, comes from many diffuse sources. NPS pollution is caused by rainfall or snowmelt carrying away natural and human-made pollutants, depositing them into water bodies and underground sources of drinking water. These pollutants include:

-Excess fertilizers, herbicides, and insecticides from agricultural lands and residential areas
-Oil, grease, and toxic chemicals from urban runoff
-Sediment from improperly managed construction sites
-Bacteria and nutrients from livestock, pet wastes, and faulty septic systems;