The practice and economic theory reveal relationships of dependence, between degree of reduction of pollutant residues, on the one hand, and the cost, as well as the total positive effects which is to be made by the control and the actions of reduction the degree of pollution, on the other hand....

The destructive impact of antropic activities can no longer be ignored and all the human activities – from industry to domestic household - must impose a friendly behavior in relation to the environment. The environmental protection is an esential part of the enlarged reproduction and modern...