Why are R-22 refrigerants being phased out?

R-22 refrigerants are being phased out primarily because of their potential to deplete the ozone layer. This refrigerant contains hydrochlorofluorocarbons (HCFCs), which have been shown to contribute to ozone layer depletion when released into the atmosphere. As international environmental awareness has grown, particularly following agreements like the Montreal Protocol, many countries have implemented regulations to gradually phase out substances that harm the ozone layer. This transition is aimed at protecting the Earth’s atmosphere and minimizing the impact on climate change.

The other options do not accurately capture the primary reason for the phase-out. While costs can be a factor, the primary concern is environmental impact. The effectiveness of R-22 compared to newer refrigerants is not the main issue driving the phase-out; instead, it's more related to environmental safety. Regulations concerning aging equipment are important for ensuring safety and efficiency, but they are secondary to the overarching goal of ozone protection.