Читать книгу Climate Change For Dummies - Elizabeth May - Страница 57

Hydrofluorocarbons. Perfluorocarbons. Sulfur hexafluoride. Try saying those names three times fast. They’re as hard to say as they are effective at trapping heat. These three types of gases are all human-made and don’t exist naturally in the atmosphere. They come from a number of different industrial processes that create air pollution.

Almost all car air-conditioning systems use the 13 hydrofluorocarbons (HFCs). (We look at how industry emits these GHGs in detail in Chapter 5.) Most of the seven perfluorocarbons (PFCs) are by-products of the aluminum industry. Sulfur hexafluoride (SF₆) comes from producing magnesium, and many types of industry use it in insulating major electrical equipment.