EPA 608 Core · Ozone Depletion · Medium
Which element in CFCs and HCFCs is responsible for ozone depletion?
Answer: D. Chlorine.
- AFluorine.
- BCarbon.
- CHydrogen.
- DChlorine.✓ Correct
Why D is right
A single chlorine atom can destroy up to 100,000 ozone molecules in the stratosphere.
More Core questions
- How does chlorine destroy ozone?
- What makes HFC refrigerants harmful to the environment?
- 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?
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.