EPA 608 Core · Ozone Depletion · Medium
What makes HFC refrigerants harmful to the environment?
Answer: A. They have a high Global Warming Potential (GWP).
- AThey have a high Global Warming Potential (GWP).✓ Correct
- BThey severely deplete the ozone layer.
- CThey contain highly toxic chlorine.
- DThey produce smog in the lower atmosphere.
Why A is right
While HFCs do not deplete ozone (ODP=0), they are potent greenhouse gases with high GWPs.
More Core questions
- Which metric compares a gas's global warming impact to carbon dioxide?
- Why can CFCs released at ground level damage the ozone layer?
- R-410A has a GWP of about 2,088. What does that mean?
- What is the Ozone Depletion Potential (ODP) of HFC refrigerants such as R-134a and R-410A?
- Which refrigerant type contains chlorine and has the highest ODP?
Go deeper with the study guide EPA 608 Core Exam: Study Guide for 2026, try the free 10-question test or browse all EPA 608 practice questions.
A practice question written for study, checked against 40 CFR Part 82, Subpart F. It is not an official EPA exam question, and this site is not affiliated with the U.S. EPA.