HVAC - EPA Certification Practice Exam

Which term refers to the assessment of a chemical's ability to destroy ozone?

1. Global warming potential

2. Ozone depletion potential

3. Greenhouse gas potential

4. Atmospheric impact potential

The correct answer is: Ozone depletion potential

The term that refers to the assessment of a chemical's ability to destroy ozone is "Ozone depletion potential." This concept is critical in understanding how various substances, especially certain refrigerants and solvents, can contribute to the thinning of the ozone layer in the Earth's stratosphere. The ozone layer plays a vital role in protecting life on Earth by filtering out harmful ultraviolet (UV) radiation from the sun. When a chemical has a high ozone depletion potential, it signifies that it can significantly contribute to ozone layer depletion. This is particularly relevant in environmental studies and regulations concerning the use and phase-out of substances that harm the ozone layer, such as chlorofluorocarbons (CFCs) and halons. In contrast, the other terms listed relate to different environmental impact assessments. Global warming potential evaluates a substance's ability to trap heat in the atmosphere contributing to climate change, while greenhouse gas potential specifically refers to gases that contribute to the greenhouse effect. Atmospheric impact potential is a more general term and does not specifically focus on ozone depletion. Thus, the emphasis on ozone depletion potential accurately conveys the specific environmental concern posed by certain chemicals.