Aircraft engine maker Rolls-Royce and UAE’s Etihad Airways signed today a comprehensive agreement to facilitate the development of sustainable aviation. The agreement comes as part of Etihad’s broader strategic sustainability program and targets the application of electrification technologies and hybrid systems, for commuter aircraft and the fast-emerging urban air mobility (UAMs) sector. “Our long-standing relationship with Etihad Airways provides an excellent foundation to build innovative solutions in aviation as we embark on our common journey towards an increasingly sustainable industry,” Rolls-Royce civil aerospace president, Chris Cholerton, said.