Which of the following gases has the maximum Global Warming Potential (GWP)?

Sulphur hexafluoride traps heat many thousands of times more effectively than carbon dioxide over a century.

Chlorofluorocarbons have high warming potential yet stay well below sulphur hexafluoride.

Carbon dioxide is the reference gas with a warming potential set at one.

Methane warms strongly but only tens of times more than carbon dioxide.

Among these the fluorinated gas with the longest lifetime and strongest absorption tops the scale.

Sulphur hexafluoride is used as an insulating gas in electrical switchgear.