Campbell discusses the idea that information changes as journalists gather, interpret and disseminate environmental information. A model is included, which describes the flow of environmental information in the media and shows that journalists retrieve information from a complex range of sources and repackage it in a simplified format. Campbell investigates the ways in which reporters routines their work procedures and how they apply the rules implicit in the news process. It examines the techniques used by journalists to evaluate news potential in environmental issues, the practices used to gather information and the methods employed to construct the news.