The most important task is to make sure that all relevant, significant costs are considered when making business decisions. In other words, “environmental” costs are just a subset of the bigger cost universe that is necessary for good decision making. “Environmental” costs are part of an integrated system of material and money flows throughout a corporation and not a separate type of cost altogether. Doing environmental management accounting is simply doing better, more comprehensive management accounting, while wearing an “environmental” hat that opens the eyes for hidden costs. Therefore, the focus of material flow accounting is no longer on assessing the total “environmental” costs, but on a revised calculation of production costs on the basis of material flows.