Global climate change has a significant negative impact on both sustainable development and the stability of international relations in the world. Global climate change affects both international relations and sustainable environmental policies to varying degrees. However, currently, most studies focus on analyzing the impact of climate change on the global environment from the perspectives of economic development and food security, and there is no discussion of the linkages between climate change, sustainable environmental policies, and international relations, so this study will analyze the sustainable development issues and international relations in terms of the impact of climate change on China by using realism theory and Liberalism theory. This study shows that climate change, environmental security planning, and international relations are interactive. A rational and valid environmental security planning mitigates the effects of climate change to a certain extent, while the implementation process of security planning contributes to the harmonious development of international relations.
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