What statement is true regarding ChloroFluoroCarbons (CFCs) and HydroChloroFluor

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试卷: LEED GA模拟题A[查看]
What statement is true regarding ChloroFluoroCarbons (CFCs) and HydroChloroFluoroCarbons (HCFCs)?
A: CFCs are banned under the Montreal Protocol while HCFCs are not
B: CFCs have a greater global warming potential (GWP) than HCFCs
C: The ozone depletion potential (ODP) of HCFCs and CFCs is about the same
D: LEED encourages replacing CFC or halon-based fire suppression systems with HCFCs

参考答案: B

本题解释:
Both CFCs and HCFCs are banned under the Montreal Protocol. CFC production in the United States stopped in 1995. Developing nations that signed the treaty agreed to stop producing CFCs by 2010; CFCs do have a greater global warming potential (GWP) compared to HCFCs.

See Table 1 in the reference. Every CFC listed has a greater GWP than the HCFCs listed;HCFCs have much smaller ODP values than CFCs, but their ODP values are not zero. HCFCs do less than 2% ozone damage compared to CFC-11;LEED promotes using fire-suppression systems that do not contain CFCs, HCFCs, or halons