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In page Fluorocarbon:

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Low-boiling perfluoroalkanes are potent greenhouse gases, in part due to their very long atmospheric lifetime, and their use is covered by the Kyoto Protocol.[citation needed][7] The global warming potential (compared to that of carbon dioxide) of many gases can be found in the IPCC 5th assessment report,[8] with an extract below for a few perfluoroalkanes.