News Desk ABU DHABI: Boeing [NYSE:BA] and Etihad Airways concluded testing on the aerospace company’s 2020 ecoDemonstrator programme last week with a cross-country flight using a 50/50 blend of sustainable and traditional jet fuel. Flying from Seattle to Boeing’s manufacturing site in South Carolina, Etihad’s newest 787-10 Dreamliner used the maximum sustainable fuel blend permitted for commercial aviation. The transcontinental …