As the world gets hotter, staying cool becomes more important. Even here on the north coast air-conditioners are becoming more common. AC, refrigerators, and other cooling equipment use a refrigerant gas called hydrofluorocarbon (HFC) that traps thousands of times more heat than CO2. California is currently working on a bill to address the deadly loop of proliferating HFCs leading to higher temperatures, which lead to more HFCs.