Japanese airlines eye shift to greener fuels with carbon neutrality in sight July 3, 2021 (Mainichi Japan) A Japan Airlines Co. passenger jet is seen ahead of its first commercial flight using domestically produced biofuel, on Feb. 4, 2021, at Tokyo's Haneda Airport. (Mainichi/Hiroshi Maruyama) TOKYO (Kyodo) -- Going electric may be one solution for automakers to ride a global decarbonization trend, but for airlines, it is greener fuels that are grabbing their attention. Japan has joined a group of nations in pledging to achieve carbon neutrality by 2050 but still lags behind Europe and the United States where more companies put biofuels from materials like waste cooking oil into commercial use for airlines. Hydrogen is also seen as an alternative source to fly aircraft.