[Figure3] (IMAGE) National Research Council of Science & Technology Caption KERI Eco-Friendly Power Apparatus Research Center, which developed ‘K6 eco-friendly insulating gas’ to replace SF6 Credit Korea Electrotechnology Research Institute Usage Restrictions The sources of photos and research results from KERI must be specified. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.