EPA 608 Core · Clean Air Act & Montreal Protocol · Medium
What international agreement first phased out ozone-depleting substances?
Answer: D. The Montreal Protocol
- AThe Kigali Amendment
- BThe AIM Act
- CThe Kyoto Protocol
- DThe Montreal Protocol✓ Correct
Why D is right
The Montreal Protocol was the original treaty to phase out CFCs and HCFCs.
More Core questions
- What was the primary goal of the original Montreal Protocol?
- Which international agreement targets the global phasedown of HFCs?
- Since January 1, 2020, how can existing R-22 systems be serviced?
- When did U.S. production of CFC refrigerants such as R-12 end?
- What is the primary difference between the Montreal Protocol and the Kigali Amendment?
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.