Red Seal Refrigeration and Air Conditioning Mechanic Practice Exam 2026 - Free HVAC Practice Questions and Study Guide

The primary environmental concerns associated with the use of refrigerants center around ozone depletion and global warming potential. Certain refrigerants, particularly chlorofluorocarbons (CFCs) and hydrofluorocarbons (HFCs), have been identified as harmful to the ozone layer, which protects the Earth from harmful ultraviolet (UV) radiation. When these substances are released into the atmosphere, they can rise to the stratosphere where they undergo breakdown processes that result in the destruction of ozone molecules.

In addition to ozone depletion, many refrigerants also have significant global warming potential. This means that, despite their low concentrations in the atmosphere, their ability to trap heat can lead to an enhancing effect on climate change. HFCs, for instance, are several thousand times more potent than carbon dioxide in their heat-trapping capabilities over a specific time frame. This dual impact of ozone layer harm and contribution to global warming makes the use of certain refrigerants a pressing environmental issue.

While other options present valid environmental concerns, they do not specifically relate to the most pressing issues regarding refrigerants. Therefore, the focus on ozone depletion and global warming potential captures the key ecological implications tied to refrigerant use.