“…Greenness exposure has been associated with reductions in risks of various health outcomes, including self-perceived health (Maas et al, 2006;Mitchell and Popham, 2007), blood pressure (Agyemang et al, 2007) and mortality (Villeneuve et al, 2012). The causal nature of these associations is not established to date (Bowler et al, 2010;Lee and Maheswaran, 2011) and the biological mechanisms potentially in play are not clear, but possible pathways include reduction of exposure to noise, air pollution (Dadvand et al, 2012b) and urban heat (Jenerette et al, 2011), as well as stress relief (Fan et al, 2011;van den Berg et al, 2010).…”