“…Conversely, the public green spaces (PGSs) represent those that can be accessed freely and treated as public goods (de la Barrera, Reyes-Paecke, & Banzhaf, 2015). The PGSs in urban cities include the natural places dominated by green vegetation (e.g., forests, woods, gardens, and parks) and the artificial green spaces (e.g., roadside greenbelts, riverside greenbelts, green spaces around residence, green spaces around institution, squares and plazas) (Chen, Liu, & Liu, 2016;Shan, 2014;de la Barrera et al, 2015). In most cases, the PGSs are not evenly distributed in space within the urban cities (Barbosa et al, 2007;Ernstson, 2013;McConnachie & Shackleton, 2010).…”