Austrian Airlines, a subsidiary of Deutsche Lufthansa AG (OTC:DLAKY), has been reprimanded by a court for making misleading environmental claims. The airline had advertised that its flights to an art exhibition in Venice would be operated using 100% sustainable aviation fuel, but it was revealed that only 5% of the fuel used was from renewable sources. Following the ruling, the airline was ordered to display the court's decision on its website and social media platforms and cover the legal fees of the consumer-protection association.