Carbon dioxide emissions from regional tourism transport: a substitutional bottom-up analysis Decomposition characteristics of a Vulpia myuros cover crop in an orchard soil and its effect on N supply The carbon emissions embodied in Chinese household consumption by the driving factors Estimation model of carbon dioxide emissions by regional tourism transportation and empirical analysis of Nanjing and Huangshan cities, China Spatial pattern and influencing factors of carbon dioxide emissions efficiency of tourism in China Influence of Plants on CO2 and CH4 Emission in Wetland Ecosystem