Challenges to national defence in contemporary geopolitical situation

The article shows that global climate changes are already visible in Ukraine. At the same time the climatic consequences that Ukraine will face will not be so critical for population incubation, as, for example, in Africa and East Asia. In these regions, the catastrophic decline in drinking water and fertile land will stimulate migration to new territories for survival. Climate refugees, according to the authors, will become one of the main challenges to the national and food security of Ukraine and the European region.