EPA Section 608 Universal Certification ExamCoreEasy
What is the primary environmental concern associated with the release of hydrofluorocarbon (HFC) refrigerants into the atmosphere?
- ADepletion of the stratospheric ozone layer.
- BFormation of acid rain.
- CContribution to global warming.
- DIncreased smog and ground-level ozone.
Show answer & explanationAnswer & explanation
Correct answer: C. Contribution to global warming.
HFCs have an Ozone Depletion Potential (ODP) of zero, meaning they do not harm the stratospheric ozone layer. However, they are potent greenhouse gases with high Global Warming Potentials (GWPs), contributing significantly to global warming and climate change.
Why the other options are wrong
- A. HFCs do not contain chlorine or bromine, so they do not deplete the ozone layer (ODP=0). CFCs and HCFCs are responsible for ozone depletion.
- B. Acid rain is primarily caused by sulfur dioxide and nitrogen oxides, not HFCs.
- D. Smog and ground-level ozone are generally caused by volatile organic compounds and nitrogen oxides, not HFCs.
HFC Environmental Impact
Hydrofluorocarbons (HFCs) are refrigerants with zero Ozone Depletion Potential (ODP) but are potent greenhouse gases, contributing to global warming.
- ODP = 0 (do not deplete ozone layer).
- High Global Warming Potential (GWP).
- Regulated under the AIM Act in the US, and Kigali Amendment internationally.
- Being phased down due to climate change concerns.
Memory trick: HFCs: High warming, No ozone harm.