One kilogram of sulphur hexafluoride (SF₆) traps as much heat as 23 500 kg of CO₂ and lingers in the atmosphere for roughly 3 200 years (IPCC). Yet 80 % of all SF₆ is still used in electrical switchgear and 89 % of the resulting emissions come from our power grids—but only 35 % of countries even…
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