“…Source: Own calculations based on Polidoc.net (Benoit et al, 2009). sustainability, especially in the period after the 1992 Rio Earth Summit. Given public awareness of this issue, this finding resonates well with the research in comparative politics on the responsiveness of political actors to the public's issue priorities (see Ansolabehere and Iyengar, 1994;Froio et al, 2016;Klüver and Sagarzazu, 2016;Soroka and Wlezien, 2005;Wagner and Meyer, 2014;Wlezien and Soroka, 2007;Zohlnhöfer and Engler, 2014). More specifically, our results tie in nicely with insights provided by studies on sustainable development that show the evolution of (media) attention levels over time (see Holt and Barkemeyer, 2012).…”