Take sulphur hexafluoride, a greenhouse gas used-among other things-as an insulator in some sorts of high-voltage equipment.

六氟化硫是一种温室气体，它与其他物质一道作为某些高压设备的绝缘体。

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Six greenhouse gases are reported on: carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons, and sulphur hexafluoride.

BBC: NI greenhouse gas emissions fall

Emissions of all the gases, except sulphur hexafluoride, fell in Northern Ireland in the period 1990 - 2007.

BBC: NI greenhouse gas emissions fall

This is done either with mineral oils, which present a fire hazard, or with sulphur hexafluoride, the most potent greenhouse gas.

ECONOMIST: Inside story