“…As for the articles on non-formal education, these addressed different societal segments, including the local community in household waste management and natural resource conservation (Hadiyanti, 2016;Indrianti, 2016;Patterson, Lindén, Edward, Wilhelmsson, and Löfgren, 2009); the public and private sectors in environmental bioethics and food consumption (Oto et al, 2012;Ribas et al, 2017;Ruini et al, 2016); health professionals dealing with alcohol consumption issues and healthcare waste management (Brumby et al, 2011;Kumar, Somrongthong, and Shaikh, 2015); household water end-users (Kossieris, Kozanis, et al, 2014;Kossieris, Panayiotakis, et al, 2014); consumers and retailers (Nagata, Azuma, Oda, Fujiwara, and Hanya, 2014); the general public on solid and municipal solid waste management (Kamaruddin, Pawson, and Kingham, 2013;Polanec et al, 2013); and, studies directed to youth from middle school age (Hadjichambis, Paraskeva-Hadjichambi, Ioannou, Georgiou, and Manoli, 2015), to university age (Yang, Chien, and Liu, 2012).…”