ESCO Air Conditioning Practice Exam 2026 - Free AC Certification Practice Questions and Study Guide

Chlorofluorocarbons (CFCs) are being phased out primarily due to their significant role in ozone depletion. These compounds, once commonly used in refrigeration and air conditioning systems, release chlorine atoms when they break down in the atmosphere, which can destroy the ozone layer. The Montreal Protocol, an international treaty adopted in 1987, set the groundwork for the reduction and eventual elimination of CFCs along with other ozone-depleting substances.

CFCs not only pose environmental risks by harming the ozone layer but also contribute to global warming. As a result, their production and use have been heavily regulated, encouraging a shift towards more environmentally friendly refrigerants. While hydrochlorofluorocarbons (HCFCs) and other alternatives are also under scrutiny, the primary concern historically has been with CFCs, making them the standout choice in this context.