Computer-based systems for processing environmental information have been in use for more than three decades now. A broad range of applications is covered by these systems, including monitoring and control, information management, data analysis, as well as planning and decision support. Progress in informatics has made an invaluablecontribution to our ability to analyse the biological, chemical and physical processes taking place in the environment. Inversely, the complex nature of problems occurring in environmental contexts is a great challenge to informatics. From this process of mutual stimulation, a special discipline has emerged known as Environmental Informatics. It combines computer science topics such as database systems, geographic information systems and simulation modelling with respect to their application to environmental research and protection.