SF₆ is a potent greenhouse gas with a global warming potential of over 23,000 times greater than carbon dioxide. It is used as an electrical insulator in high voltage equipment that transmits and distributes electricity. At PHI, we established an SF₆ emission reduction goal of 50 percent from a 2010 baseline by the end of 2011. We achieved our 2011 goal with a 57 percent reduction. By 2013, our emission reduction goal reached 78 percent since 2010. We achieved this emission reduction by replacing underground SF₆ gas-insulated 69 kV feeders, which were upgraded due to their design and age. These transmission lines were replaced with new feeders that do not use SF₆. Additionally, all PHI companies replace older circuit breakers in substations, as necessary, with new state-of-the-art, hermetically-sealed equipment.