What type of contaminants can end up in potable water sources as a result of was

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试卷: LEED GA模拟题F[查看]
What type of contaminants can end up in potable water sources as a result of wastewater overflows?(choose 2)


A: Toxic metals
B: Radon
C: Nitrogen
D: CO2
E: Bacteria

参考答案: AB

本题解释:
Radon is a naturally-occurring radioactive gas that may cause cancer, and may be found in drinking water and indoor air. Some people who are exposed to radon in drinking water may have increased risk of getting cancer over the course of their lifetime, especially lung cancer. Radon in soil under homes is the biggest source of radon in indoor air, and presents a greater risk of lung cancer than radon in drinking water. (EPA)
CO2 comes from the burning of fossil fuels