He, Jie, Cai, Xiaomei, Li, Guiqing, Zou, Xiaodan and Morrison, Alastair ORCID: 0000-0002-0754-1083 (2022) Volunteering and pro-environmental behavior: the relationships of meaningfulness and emotions in protected areas. Journal of Sustainable Tourism. ISSN 0966-9582 (Print), 1747-7646 (Online) (doi:https://doi.org/10.1080/09669582.2022.2141249)