The purpose of this Article is to review international environmental law as, in a certain sense, a special field of international law. In doing this, it is not the intention to argue, or even imply, that international environmental law constitutes in some way a special branch or regime separate from the mainstream of traditional or classical international law. Rather, what we will be doing is to look, firstly, at certain ways in which special features of the environment as a subject matter of international law have resulted in particular solutions, applications or rules within the general principles of international law which, if not necessarily unique to, are at least particularly characteristic of, environmental law. Secondly, we shall see, however, that the attempt to provide a necessary legal framework to meet the problems of the environment, both alone and in relation to other perceived problems of the modern world, are stretching and possibly straining the limits of classical international law. The result is that international environmental law is at present also characterised by the rise of novel theories, many of which are not universally accepted, but which may, neverthless be very influential in the whole field, political, legal and scientific, of environmental protection.