China's Grid Is World's Top Source of 24,300x-Worse SF6 — SkimNews
Get the Energy newsletter
Daily energy & climate — solar, EVs, oil, the policy fights and tech bets shaping the transition. Free.
- Sulfur hexafluoride (SF6), used as electrical insulation in high-voltage equipment, is 24,300 times more warming than CO2 by mass and persists in the atmosphere for roughly 1,000 years once released
- China's power grid is the single largest global emitter of SF6, despite China being a worldwide leader in renewable energy deployment
- SF6 is deployed primarily in circuit breakers and other high-voltage switching equipment, where it prevents dangerous electrical arcing
- The gas is nearly impossible to destroy chemically and functions as a critical safety barrier in any modern electrical grid, ensuring electricity flows only where and when intended
- Emissions originate almost entirely from the electricity sector, since the gas leaks during equipment operation and maintenance across high-voltage infrastructure
Why it matters: SF6 leaks are unavoidable during routine operation and maintenance of high-voltage equipment, and China's massive grid expansion multiplies those leaks — meaning a molecule released now traps heat for the next millennium. The country's status as both renewable leader and top SF6 emitter exposes a blind spot in climate accounting that counts installed clean capacity without weighing insulation gases inside it.
Ask SkimNews
