Environmental problems are of many different kinds and share some features. Approaches to decision making has to match those features. A classification of approaches to prepare environmental decision-making is suggested with respect to degree of aggregation. Neoclassical Cost-Benefit analysis is then criticized and Positional Analysis (PA) suggested as an alternative. The concept of economics is reconsidered and the purpose of PA clarified. Systems thinking, positional thinking (largely in non-monetary terms) and a way of analysing interests are presented.