Much of the literature about environmental issues and mass media is based on case studies of specific problems or events. In contrast, this paper will explore such issues from a longitudinal approach. The objective of this research was to explore the social representation (SR) of the environment and environmental issues, specifically the representation that is constructed and spread through the press. Assuming that SR are stable entities, that require time in their process of formation, a study of longitudinal character was made looking for to characterise the evolution of this representation throughout the Nineties.The paper presents empirical data from two different Spanish newspapers: ‘La Vanguardia’ and ‘El País’ in their Barcelona edition. Twelve issues of each pair year of the decade were reviewed searching for environmental news, obtaining a sample of 1400 news. The analysis of press articles was structured in two parts, taking care both the format (newspaper, section, length of the article, use of pictures/graphs, etc.) and the content of the news (actors, context, themes, author’s posture, etc.). In this sense, data analysis was conducted coding each new and developing a database of codes and, subsequently, themes (Strauss and Corbin, 1990).The longitudinal study shows not only how environmental news has been increasing throughout the decade, but also their diversity. The urban problems have a greater presence on the newspapers. In spite of this, the environment continues being associated to natural environment due to the use of this type of images in the pictures.