#mdpisustainability Invitation for submissions! New special issue “Sustainability of Air Transport System: A Quantitative Assessment of Current and Future Developments”, guest edited by Prof. Milan Janić from Delft University of Technology. Read more at: https://www.mdpi.com/journal/sustainability/special_issues/Sustainability_Air_Transport_System_Quantitative_Assessment_Current_Future_Developments …pic.twitter.com/BSUoQqqGPQ
