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Asia is one of the fastest-growing regions in international tourism, economic growth, and CO2 emissions around the globe. However, the relationships between tourism and CO2 emissions are little and unclearly identified. The purpose of the study is to explore the asymmetric nexus between tourism and CO2 emissions in a panel of five high emitters Asian countries covering the period of 1995–2019 by using panel-NARDL-AMG. The empirical results reveal that a positive shock in tourism arrivals increases CO2 emissions, while a negative shock also increases CO2 emissions in the long run. Moreover, a negative shock has a greater effect on CO2 emissions than a positive shock in Asia in the long run. Tourism receipts are expected to maintain the robustness of CO2 emissions in the long run in Asian economies. The authorities should develop and design green international tourism activities in the Asian economies. [ABSTRACT FROM AUTHOR]