The article describes the current problems of international environmental security in the context of the systematic manifestation of the principles of its implementation, which justifies the need to consolidate the efforts of interstate environmental measures on the basis of sustainable and balanced development. The article examines prerequisites for the formation of the global environmental safety as an integral part of international relations and politics against the background of the long-term ecological crisis. Features of the global environmental safety and levels of its operation on a territorial basis are singled out and grounded. Attention is focused on transboundary character of the manifestation of most environmental threats and hazards, making it impossible for countries to overcome the consequences on their own. Emphasized are global threats and hazards that will determine areas of cooperation in the global environmental safety in the near future. Parity basis and principles of formation of global ecologically safe space are outlined. Considering the world experience of the implementation of forms and methods of economical use of natural resources and observance of safety of existence, directions of strategic planning of national environmental safety are suggested. It was determined that globalization processes on the planet increase the threat to humanity in the form of environmental hazards: destruction of the ozone layer of the atmosphere and manifestations of global climate change, pollution of the world ocean, civilizational confrontation between the Christian and Muslim world, the creation and functioning of a global terrorist network, the spread of nuclear, chemical, biological , geophysical, space, psychotropic, environmental weapons and technologies of mass destruction. The main mechanisms for the implementation of international environmental security should be considered interstate cooperation, the creation of mechanisms for effective international consulting, peaceful settlement of disputes, prevention of transboundary environmental pollution, scientific and technical cooperation, international responsibility for transboundary environmental damage, public control, and the involvement of international non-governmental and public organizations in emergency environmental situations It has been proven that the mechanisms of international environmental security during emergency situations require the consolidation of efforts of interstate environmental measures on the basis of sustainable and balanced development.