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"Drawing on the debate on mediatization of politics this study identifies cultural meanings, institutional practices and styles of argumentation as three theoretical dimensions that illuminate both the construction of journalistic publicity and its potential uses in political action. Based on the theoretical model, environmental politics is identified as a specific context for mediatization. In environmental politics, the interplay of cultural meanings, institutional practices and styles of argumentation define the construction and use of journalistic publicity in a way that differs from other fields of politics.

The empirical part of this study analyzes the newspaper coverage of three Finnish environmental conflicts from 1971, 1994 and 2012. The theoretical model is transformed into an analytical framework that focuses on discursive construction of the conflicts (cultural meanings), journalistic frames, narration and opinion-giving in the coverage of the conflicts and the publicity practices adopted by actors during the conflicts (institutional practices) and legitimation of arguments (styles of argumentation).

According to this study, the relation between media and politics in the field of environmental politics is defined by the increasing cultural significance of environmental protection from the 1970s to the present. In the newspaper coverage of the three environmental conflicts studied, changes on the frames, narration and opinion-giving of journalism resonated with this cultural change. However, the significance of environmental protection in the framing, narration and opinion-giving of journalism was greater in the national newspaper studied compared to the local newspapers selected based on their proximity to the conflict sites. Styles of argumentation appeared to be more case dependent. The increasing cultural significance of environmental protection did not have a clear effect on how arguments were legitimated. "

During the last few decades sustainable development has become a frequent topic among policy makers. In order to achieve this goal, the local level in the society has been regarded as one of the levels where changes towards a more sustainable development must come about. To this end, the Swedish state has used different instruments of control to influence its municipalities to start these changes. One example is the Local Investment Programme (LIP) which supported many different local investment programmes in Swedish municipalities between 1998-2002. The municipality of Luleå, where changes of the public transportation system were on the political agenda, received in 2000 financial support for a project called Public transportation in change. The aim of the project was to create a more attractive public transportation system, i.e. bus system, in order to get more people to choose the bus for their daily travels. Policy processes are however not always as rational as policy makers might think. Instead, they can sometimes be characterized as an incremental process with sudden changes. In order to conceptualize such processes, especially agenda- setting and decision making, John Kingdon has developed the multiple- streams framework (MS). According to this framework the policy process is separated into three streams; problem, policy and politics. When a window of opportunity opens, a policy entrepreneur with the right skills and institutional position might couple the streams thereby creating a policy change. The aim of this study is to describe and analyze the policy process underpinning the public transportation in Luleå kommun and explain why the process developed the way it did. The purpose is thereby to contribute to the understanding of the problems that are associated with local policy making regarding public transportation and sustainable development. Another aim is to test whether MS is applicable in a local context. The empirical material is made up of documents, interviews with policy makers, material from the local newspapers and a survey to the public. It is concluded that the 2002 election to the municipality council was the window of opportunity that finally brought about the introduction of a new bus system. The LIP programme mainly affected the local process in a positive way. It might even have been another reason that the new bus system was realized at this point. There were some problems concerning the institutional arrangement around the LIP programme, which seems to have caused a minor delay in the project. The study also indicates that sustainable development at the local level is associated with many problems. Rhetorically sustainable development is regarded as an important goal, but in reality there are differences about how to view and realize the concept. Sustainable development has been described as ecological, economical and social sustainability in cooperation or that they can be ranked. It is concluded that economical constraints seem to set the conditions in reality. Finally, MS has been found useful in a local context as well. MS have weaknesses concerning how it addresses value based conflicts and institutional arrangements. While this study deals with those problems, it is suggested that more studies should be conducted. ; Godkänd; 2006; 20070109 (haneit)