Environmental conferences and conventions are widely different from other treaties because environmental issues are linked together as links in a chain and accepted based on the common interests of humanity. Also, the principles of international environmental law are fundamental theories on which other behavioral principles and norms are based and can be a guide for the formation of norms and have the context of becoming the provisions of binding documents and rules. The result of this research, the contents of which were collected in the descriptive and analytical method in international documents, and the information was collected based on library studies and the review of international documents, showed that the coastal governments that build artificial islands in the Persian Gulf and the Caspian Sea are committed Committing themselves to regional and international commitments and taking guidance from the provisions of several conferences and conventions on environmental issues and by applying the principles of international environmental law, they can be aware of their role in reducing the environmental consequences of the construction of artificial islands in these two water regions turn around.
