Transportation HFC emissions in the U.S. 1990-2022

Transportation-related hydrofluorocarbons (HFCs) emissions in the United States totaled 29.6 million metric tons of carbon dioxide equivalent (MtCO₂e) in 2022. Although transport HFC emissions have experienced an overall increase relative to 1992 levels, they have fallen by roughly 55 percent since peaking in 2008. Hydrofluorocarbons (HFCs) are human-made greenhouse gases that are often used as a substitute for ozone-depleting substances in air conditioning, refrigeration, and other applications.

2022年，美国交通相关氢氟碳化物（HFCs）排放总量达到2960万吨二氧化碳当量（MtCO₂e）。尽管与1992年水平相比，交通HFC排放量总体呈上升趋势，但自2008年达到峰值以来，排放量已下降约55%。氢氟碳化物（HFCs）是一种人造温室气体，常被用作空调、制冷及其他应用中替代臭氧耗竭物质的物质。