The variety of notions of responsibility and liability, used by many publicists, continues to be a source of confusion. It would, therefore, be very clarifying to introduce one meaning for one concept and, thus, use the notions as the ILC defines them. The survey of the several 1LC reports on responsibility and liability shows that the concepts have become more and more interrelated. A different approach might be needed on the subject of international liability in order not to diminish the usefulness these rules can have within the environmental fiel.