Complex modern societies require new ways of political conflict solution, especially concerning environmental conflicts. We distinguish six forms of conflict solution, including those of mediated bargaining and cooperative discourse. If one opts for cooperative discourse, further orientation according to criteria such as fairness, competence, legitimation and efficiency seems to be important. Three procedural steps within cooperative discourse-i.e. establishing relevant value attitudes, expert-hearings, evaluation of options by citizen panels-are sketched and critically discussed, making use of experience from recent discoursive siting panels (...) in Switzerland and Southern Germany. With the exception of a legitimatory deficiency (which may be improved) cooperative discourse and citizen participation in environmental decision-making turn out to be most promising. (shrink)