Climate change as a common environmental challenge has threatended human life across the globe. Increasing concern about the consequences of such crises in INTERNATIONAL environmental law has led to coordinated and cooperative actions between all INTERNATIONAL legal actors in order to overcome such problems. The newest legal concepts and doctrins, have been trying to play a role in protecting global environment. This article will firstly address the interaction between the basic principles of INTERNATIONAL environmental law through the concept of “ common concerns of humanity” . Then, it goes through the INTERNATIONAL community duties regarding obligations Erga Omnes. Also the INTERNATIONAL legal actor‘ s obligations to confront with common environmental concerns would be examined.

The principle of INTERNATIONAL Cooperatio is of great importance in the INTERNATIONAL environmental law as one of the public INTERNATIONAL law branches. In this fram ework the euitable and reasonable utilization of territory and management of common resources such as trans boundary water resources and INTERNATIONAL lakes requires INTERNATIONAL COOPERATION.Universal desire to Public’s need to cooperate toward environmental protection in many binding and non - and its implementation in global and regional scope is studied legal basis of the principle of COOPERATION in INTERNATIONAL environmental law is expressed the 1972 Stockholm Declaration is one of the first texts who initiate this issue. In this paper, is expressed. Article 24 of environmental law texts binding INTERNATIONAL.

In our time, the nation of going unpunished particularly amongst those offenders who are suspected of INTERNATIONAL crimes has caused major difficulty in the relations between the nations. Historically, those suspects of INTERNATIONAL crimes who were in possessions of enough power and immunity have never had to surrender to justice. In the latter part of the twentieth century therefore, the consensus of the nations was to enact laws and procedures such as making INTERNATIONAL crimes resistant against limitation of action provisions, obligation the nations to extradition, legal aid and assistant and establishment of INTERNATIONAL Criminal Courts in order to prevent the INTERNATIONAL criminals to escape punishment. The Statute of INTERNATIONAL Criminal Courts is an instrument, in the Part 9 of which entitled "INTERNATIONAL COOPERATION and judicial assistance" contains the requirement of carrying out the commitments by the nations in various forms. According to this Statute in order to cooperate with the Court all the member states are obliged to A Revue de Recherch Juridique, No. 45, 2007 enact laws in their domestic legal systems. The Part 9 also contains provisions in respect of requests for the arrest and handing over of the offenders, other forms of COOPERATION and the manner of interaction between the states and the Court. Nonetheless, the member states may in following the provisions of the Statute encounter certain constraints resulting from their previous commitments to other nations prior to their joining the Statute.

The initial discrepancy of «Neorealism» and «Neoliberal Institutionalism» reffers to the matter of COOPERATION in INTERNATIONAL relations. This is because, the first yieldes relative gains, while the latter accountes on absolute gains in cooperative atmosphere. Also Neoliberal Institutionalism, unlike Neorealism, believes that with the help of INTERNATIONAL institutions, one can gain INTERNATIONAL COOPERATION. The second step of this argument is structured around the competing views of «energy independence» and «energy interdependence» regardes. Then we apply this framework to Iranian oil and gas trade structure with current statistics to support the validity of COOPERATION from energy interdependence point of view.