HVAC - EPA Certification Practice Exam 2026 - Free EPA Certification Practice Questions and Study Guide

The primary environmental concern regarding HCFC refrigerants is that they contribute to ozone depletion. HCFCs (Hydrochlorofluorocarbons) contain chlorine, which can break down ozone molecules in the stratosphere. The ozone layer is crucial for blocking harmful ultraviolet (UV) radiation from the sun. When the ozone layer is depleted, it leads to increased UV radiation reaching the Earth's surface, which can result in severe environmental and health consequences, such as increased skin cancer rates and harm to ecosystems.

In contrast, the other options do not address the significant environmental impact of HCFCs. While some might be non-flammable or perceived as safe for indoor use, these factors do not mitigate their role in ozone depletion. Additionally, although HCFCs may be less expensive compared to some alternatives, cost is not an environmental concern and therefore does not influence their classification regarding environmental impact. The focus on their contribution to ozone layer depletion highlights the critical need for minimizing or replacing their use in refrigeration and air conditioning systems to protect the environment.