In this paper, the authors indicated the definition of environment risk, and analyzed the factors that increase environmental risk in the modern world. The problem of preserving the environment is acute for the whole international community. In addition, the authors analyzed the content of the concept of environmental impact assessment and its importance for maintaining environmental balance in the world. The authors described the forms of cooperation between countries in conducting an environmental impact assessment, and showed the influence of basic principles of international law on the norms governing the international environmental impact assessment procedure. The problems and prospects of normative regulation from the standpoint of the principles and norms of international law on environmental impact assessment are indicated.