---

The concept of participation and its application in various sciences particularly urban planning has been considered by thinkers and experts since several decades ago. The experience has proved that the participation to conduct urban affairs causes improving the efficiency, assigning the cost toward social priorities and fundamental projects. Nowadays, necessity of citizenship participation to enhance the physical and social condition of the cities is not inapparent over anyone. the main purpose of this article is to explain the direct/indirect relationships among the most key of urban participation barriers in Iran. To this end, it is used the interpretive structural modeling (ISM) and Matrice d’Impacts Croise´s Multiplication Applique´e a´ un Classement (MICMAC) analysis under fuzzy environment. The ISM method is interpretive as the judgment of a group decides whether and how the factors are related. It is structural as an overall structure is extracted from the complex set of factors on the basis of relationship amongst the elements of the system. The article research method is descriptive and analytical so that its part of descriptive included the literature review of urban participation barriers and problems in Iran, and its part of analytical encompassed the explanation of relationships among the barriers.

---

The media are undoubtedly exerting a profound influence on society so that they can bring about any change in the culture of society in acceptable and popular ways. There is no doubt that the media has an inactive role in introducing and recognizing the environment, preventing its destruction and improving the living conditions of the individual
The main purpose of this study is to design a model for the prevention of environmental pollution through sound and broadcast using the ISM and MICMAC approach. The present study is applied in terms of research purpose and in terms of research topic and descriptive-survey type. Data collection tool included expert questionnaire. The study population was environmental and media experts. Snowball sampling method was used to select the sample. Excel software was used for data analysis. Structural-interpretive modeling results categorized the internal relationships of the criteria into five levels. Finally, the results of the McMach analysis included the variables into two independent and dependent matrices. So that the most effective policy criteria and environmental ethics were the most effective ones.