EPA 608 Core · Ozone Depletion · Easy
Why is stratospheric ozone vital for life on Earth?
Answer: B. It filters out harmful Ultraviolet-B (UV-B) radiation.
- AIt traps heat to maintain the Earth's temperature.
- BIt filters out harmful Ultraviolet-B (UV-B) radiation.✓ Correct
- CIt produces breathable oxygen for the troposphere.
- DIt neutralizes greenhouse gases.
Why B is right
The ozone shield blocks UV-B radiation, preventing skin cancer and protecting marine ecosystems.
More Core questions
- Which element in CFCs and HCFCs is responsible for ozone depletion?
- 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?
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.