What is the name of the cancer-causing radioactive gas that can be found in the

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试卷: LEED GA模拟题F[查看]
What is the name of the cancer-causing radioactive gas that can be found in the ground, groundwater, or building materials?
A: Radon
B: Urea-formaldehyde
C: VOC
D: NH3

参考答案: A

本题解释:
Notes:

Reference: LEED for Homes Rating System
A:Radon is an odorless, tasteless and invisible gas produced by the decay of naturally occurring uranium in soil and water. Radon is found in outdoor air and in the indoor air of buildings of all kinds. Radon is a proven carcinogen and exposure to radon is the second leading cause of lung cancer after smoking.
B:This is a substance used in some glue that can cause health issues.
C:Volatile organic compounds are the result of off gassing from building materials. They are not radioactive.
D:NH3 is ammonia and is a choice for natural refrigerants.