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● “we have to adopt the development of a decentralised and renewable alternative energy source because of nation’s and our children’s future” (LMP) ● “a system using renewable energy sources also takes sustainability into account” (Energy Club) 4. Concluding remarks There are various definitions of sustainability, one of which is undoubtedly more complex than the one referenced in the previous section. The three spheres of sustainability (Rodriguez et al. 2002) touch upon the environmental, economic and social aspects as well. By considering the economic sphere, it could be debated that the arguments categorised into the topos of economy could count as arguments about sustainability. However, the term sustainability barely appeared in connection with the other identified topics in the research material, therefore, we have no reason to believe that the examined actors specifically meant the three spheres. Based on the topos analyses, we concluded that economic risks and benefits characterise the debate, and not the requirement of sustainability. The argument about sustainability is present on both sides of the controversy: those in favour of expanding the nuclear power plant argue that nuclear energy production is sustainable, and those opposing the expansion argue the nuclear is not, but renewables are sustainable. Therefore, the answer as to which energy policy is sustainable is not unequivocal. The debate should centre around discussing which mode of energy production is more sustainable according to which sphere (environmental, economic, social) and how we should prioritise them to get us closer to a sustainable future. Acknowledgements This work was supported by OTKA 109456 (Hungary). Bibliography Culler, Connie (2015), ‘Good Works: The Topoi of Corporate Social Responsibility in the Travel and Tourism Industry’ (Doctoral Dissertation), retrieved from the University of Central Florida, STARS, http://stars.library.ucf.edu/etd/1449/ (downloaded 29 June 2018) Egres, Dorottya and Anna Petschner (in press), ‘The Paks Pact: Topoi in Hungarian Nuclear Energy Discourse’ Under review, submitted In: Controversies and Interdisciplinarity, Controversies. Ethics and Interdisciplinarity, Ed. by G. Scarafile. Amsterdam: John Benjamins Publishing Company) Eriksson, Anders (2012), ‘Argumentative Topoi for Refutation and Confirmation’, in van Eemeren, Frans H. and Bart Garssen (Eds.), Topical Themes in Argumentation Theory: Twenty Exploratory Studies, Dordrecht, Netherlands: Springer. Gamson, William A. and Andre Modigliani (1989), ‘Media Discourse and Public Opinion on Nuclear Power: A Constructionist Approach’, American Journal of Sociology 95 (1): 1-37. Kristiansen, Silje (2017), ‘Characteristics of the mass media's coverage of nuclear energy and its risk: A literature review’, Sociology Compass 11 (7): 1-10. Rodriguez, Sandra I., Matthew S. Roman, Samantha C. Sturhahn and Elizabeth H. Terry (2002), Sustainability Assessment and Reporting for the University of Michigan’s Ann Arbor Campus, Report No. CSS02-04, Center for Sustainable Systems, University of Michigan. http://css.umich.edu/sites/ default/files/css_doc/CSS02-04.pdf (downloaded 29 June 2018) 213