Service quality is seen as an important corporate strategy to ensure competitive advantage. With the increase in demand for air transport, airports have become an important venue, which has brought the issue of airport service quality to the forefront. In airports, which are described as the doors of cities opening to the world, the quality of service is determined if the service provided to passengers coincides with the level of meeting the expectations of the passenger. In this context, within the scope of the study, it is aimed to measure the quality of service by evaluating 17 airports that are evaluated as five-star airports by Skytrax in 2021 based on 11 criteria. While the importance of the criteria was determined with MEREC from the MCDM methods, the ranking of 17 airports according to the quality of service was obtained with MARCOS and CoCoSo methods. Criteria used to assess the quality of service of airports; transportation services, security screenings, immigration services, signs, arrival services, departure services, transfer passenger services, terminal comfort level, terminal facilities, shopping facilities and food/beverage services. As a result of the analysis made by the MEREC method, it was determined that the most important criterion affecting the quality of service at airports was the immigration services criterion. According to the joint results of both MARCOS and CoCoSo methods, it was determined that Chubu Centrair Airport was the airport that offered the best service quality to passengers, and Tokyo Haneda Airport was the last airport in terms of service quality.

Global warming, climate change and environmental pollution are considered among the important developments that threaten all world economies. In this context, the transition to a zero-emission economy remains one of the environmental sustainability goals of policymakers. The literature investigating the tourism-environmental pollution relationship has limited emphasis on the role of green technological innovation. Therefore, this study explores the effect of tourism and green technological innovation on CO₂ emissions in top 15 most visited countries during the period of 1995–2019. Renewable energy consumption, financial development and economic growth are integrated into the CO₂ emissions equation as control variables. The cointegration tests verify the existence of a cointegration between variables. The long-run estimaters reveal that tourism, green technological innovation and renewable energy consumption serve to improve environmental quality by reducing CO₂ emissions. Contrary to these findings, financial development and economic growth play a role in the increase of CO₂ emissions implying a deterioration in environmental quality. The bootstrap causality analysis points to a bidirectional causality between tourism and CO₂ emissions and between green technological innovation and CO₂ emissions. The findings will make important contributions to policy makers in these countries in meeting their CO₂ emissions reduction targets. Graphical Abstract