Some of these CFC are almost eternal compounds. They are so stable that no natural light frequency from the sun can break them apart. Sulfur hexafluoride, used

Some of these CFC are almost eternal compounds. They are so stable that no natural light frequency from the sun can break them apart. Sulfur hexafluoride, used in high voltage circuit breakers, has a half-life of 3200 years, has a global warming potential 22800 times that of CO2. So you don't want to vent them, but any accident/leak can be considered a catastrophe. That's just the physics of it: highly dielectric + stable often makes for a big greenhouse gas offender.