Theoretically, it is well argued that environmental factors affect the growth of the tourism industry; however, from an empirical perspective, some gaps still exist in the literature. We empirically examine the effect of carbon dioxide (CO₂) and particulate matter (PM2.5) emissions on tourist arrivals in a panel of G20 countries. Using annual data from 1995 to 2014 and a series of panel data models, our results suggest that the growth of both CO₂ and PM2.5 emissions adversely affects international tourist arrivals. The results also show that the observed effect of CO₂ emissions is more pronounced in developed economies, while the effect of PM2.5 emissions is stronger for developing economies. Given these findings, our study provides and discusses a number of policy and practical implications.

从理论上讲，环境因素影响旅游业的增长是有充分论据的。但是，从经验角度看，文献中仍存在一些差距。我们经验地考察了G20国家小组中二氧化碳（CO ₂）和颗粒物（PM2.5）排放对游客入境的影响。使用1995年至2014年的年度数据以及一系列面板数据模型，我们的结果表明，CO ₂和PM2.5排放量的增长都对国际游客的到来产生不利影响。结果还表明，观察到的CO ₂效果排放在发达经济体中更为明显，而PM2.5排放对发展中经济体的影响更大。鉴于这些发现，我们的研究提供并讨论了许多政策和实践意义。