While emissions of sulfur hexafluoride (SF6), the world’s most potent greenhouse gas, have fallen sharply in the U. “Substantial additional emission reductions can be achieved if more efforts were put into minimizing emissions during servicing or through improving sealing materials in the electrical distribution systems,” said Lei Hu, a researcher with the National Oceanic and Atmospheric Administration and the study’s lead author. only account for half of all global SF6 emissions based on estimates derived from global atmospheric concentrations of the pollutant