Freon 2 topics · 2 sources ScienceEnergyA registered trademark for a cholorfluorocarbon (CFC) gas that is highly stable and that has been historically used as a refrigerant.US DOE Office of Energy Efficiency & Renewable Energy — Glossary of Energy-Related Terms retrieved 2014-05-26 Cite Science› WeatherClimate ChangeSee chlorofluorocarbons.EPA — Global Warming Glossary of Climate Change Terms Cite