In today's world, countries choose to pursue their own interests in foreign policy, the most common and least cost of which is diplomacy, which, as an independent tool, is widely used in intergovernmental relations. In the discussion of environmental problems and protection of the marine environment, diplomacy is also considered a tool to advance the goals and interests of governments. In this article, the descriptive and analytical method of environmental diplomacy from conflict to cooperation is studied and analyzed. This research seeks to explain the pattern in the context of environmental diplomacy from conflict to cooperation. The findings of this study indicate that environmental challenges both on land and in the seas and oceans arise from climate change, changing rainfall patterns, expanding industry and agriculture, population growth, reducing resources, and increasing conflicts over natural resources and foundations. Biological, exploitation of natural resources in the form of deforestation, Desertification and uncontrolled marine hunting, use of various toxins to combat plant and animal pests to disturb the ecological balance and degradation of the aquatic and terrestrial environment on a local, regional, national, regional and global scale. Therefore, the need for environmental diplomacy to identify common threats and dangers to the global environment and efforts in the form of common commitments and to deal with these threats and dangers and to protect the environment and resources on Earth, the need for environmental diplomacy is inevitable. Environmental protection is also essential for the sustainable development of the seas. From this perspective, maritime and environmental diplomacy complements macro-diplomacy and provides policymakers with a wide range of tools and options. Finally, the activation of maritime and environmental diplomacy is an effective step towards sustainable development, especially sustainable maritime development in coastal countries.
