... Nowadays, these are pressing questions. Moral psychologists have recently begun to study people's moral reasoning about ecological issues in adults (e.g., Clayton, 1998;Kaiser, Ranney, Hartig, & Bowler, 1999;Karpiak & Baril, 2008;Kortenkamp & Moore, 2001;Sacchi, Riva, Brambilla, & Grasso, 2014;Schultz & Zelezny, 1999;Thompson & Barton, 1994) as well as in children (e.g., Corraliza, Collado, & Bethelmy, 2013;Howe, Kahn, & Friedman, 1996;Hussar & Horvath, 2011;Kahn, 1997;Kahn & Friedman, 1995;Kahn & Lourenco, 2002;Kahn, Severson, & Ruckert, 2009;Kellert, 1985; see also Collado, Evans, Corraliza, & Sorrel, 2015). Overall, the studies revealed that even 6-year-olds value the relationship with the natural environment and consider environmental harm a moral violation. ...