Climate Changed

World’s Worst Greenhouse Gas Lurks at a Power Station Near You

  • GE aims to remove sulfur hexafluoride from electric gear
  • Gas has 23,500 times warming potential of CO2, doesn’t go away
Lock
This article is for subscribers only.

The most potent greenhouse gas yet measured doesn’t spew by the ton from cars or trucks. You won’t find it in human breath, and cows don’t belch it.

Yet sulfur hexafluoride, or SF6, can do far more climate damage -- pound for pound -- than such better-known gases as carbon dioxide and methane. General Electric Co. is making a concerted push to eliminate SF6 from its main use: as an insulator for electric utility equipment.