美国环保局（EPA）周五公布了一系列行动，以加快逐步淘汰氢氟碳化合物（HFCs）。氢氟碳化合物是制冷和空调系统中常用的强效温室气体。
英文原文如下：
US EPA announces new measures to phase down climate-harming HFCs
The US Environmental Protection Agency (EPA) on Friday unveiled a series of actions to accelerate the phasedown of hydrofluorocarbons (HFCs) – the potent greenhouse gases commonly used in refrigeration and air conditioning systems.
