Primary purpose of the Advanced Research Workshop held in Liberec, Czech Republic, in November 1995 was to present and to discuss the main goals, contents, projects, partners, and implications of a proposed non­ profit European Research Network, which aims at establishing research nodes at key locations in European NATO and CP countries. In papers and contributions, individual and common projects and approaches were introduced and refined. All projects are directed to solutions for the heavily polluted "Black Triangle" Bohemia, Saxony, and Silesia, which was selected as a nucleus for the network because of its geographical location and cross­ border environmental problems. In several presentations the general strategy for tackling these critical problems were outlined. A number of contributions offered potential and model solutions for individual project parts, or new project ideas and ap­ proaches. Incorporation of heterogeneous environmental systems, computer based environmental planning, contaminated site assessment, and remedia­ tion technology selection were discussed as well as various descriptions and evaluations of contamination problems on industrial and military areas in connection with proposals and techniques for clean-up and recultivation. Examples for application of modern technologies in the conversion process were presented, e.g., recycling, incineration or supercritical oxidation. Fur­ ther contributions considered the necessities for knowledge availability and transfer as well as the future challenge of preventing any harmful influence on the environment.