A Chinese cargo plane powered by a hydrogen-fuelled engine has successfully completed its maiden flight, marking a milestone in China’s push for green aviation.The 7.5-tonne uncrewed aircraft is powered by the world’s most powerful hydrogen turboprop of its kind, capable of generating more than 1 megawatt.The engine operated normally and remained in good condition throughout the 16-minute test flight on Saturday, state news agency Xinhua reported, citing the Aero Engine Corporation of China...