Fig. 2From: Sustainable development goals: conceptualization, communication and achievement synergies in a complex network frameworka Heatmap representing the weight of links between each pair of goals in the conceptual network. b Graph representation of the conceptual network, with node size related to their weighted degree centrality and edge thickness proportional to their weight. c Bar plot of the weighted degree centrality of nodes in the conceptual network; values are reported in the “Appendix”Back to article page