A new PwC study analysing how well the world's airlines report on corporate sustainability (CS) has revealed a mixed set of results. The PwC analysis, launched on November 14 shows that while there has been a positive increase in the number of airlines producing such reports, there is still much room for improvement. In launching their Building trust in the air report, PwC's global Transport & Logistics team sampled 46 airlines including Ryanair, Lufthansa, Qantas and Cathay Pacific. A team of experts then rated the quality of the reports using set criteria. The report's authors hope it will act as a catalyst to encourage the airline industry to become more transparent for stakeholders such as investors and passengers. Although 30 of the 46 sampled airlines produce a sustainability report, 62 of the top 100 airlines worldwide did not. Of the 30 PwC analysed, some of the best included Air France KLM, Iberia, Delta Air Lines, LAN Airlines, Lufthansa, Southwest Airlines and UPS.