HFCs are greenhouse gases. HFC stands for hydrofluorocarbon. These gases were used in replacement of CFCs which were deemed harmful years ago. The three most common HFCs are HFC-134a, HFC-23 and HFC-152a. They are used as refridgerants around the world. Unfortunately, these gases have a high atmospheric life span. HFC-134a has a life span of about 14 years. This means that the gas will remain in the air for that amount of time. Meanwhile, HFC-23 will last about 260 years in the atmosphere.
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