Climate change has become one of the greatest challenges facing humanity in the 21st century. This phenomenon not only affects the environment, but also has a significant impact on global security. The impacts of climate change can be felt in various aspects, from the clean water crisis, energy conflicts, to mass migration. One of the most obvious impacts of climate change is an increase in the frequency and intensity of natural disasters, such as floods, droughts and storms. These extreme weather events cause infrastructure damage, threaten food security and disrupt the economic system. The most vulnerable countries, especially those in tropical and sub-tropical regions, tend to face higher security risks. This creates tension between countries, especially in regions with limited resources. The clean water crisis is another impact of climate change that has an impact on security. With increasing global temperatures, water resources are becoming increasingly threatened. Countries that share international rivers or lakes are often involved in conflicts over access to and control of water resources. For example, the debate over the Nile between Egypt and Ethiopia shows how water supply uncertainty can fuel regional tensions. Climate change can also affect food security. With erratic weather patterns, agricultural production can be disrupted. Countries that rely heavily on traditional agriculture are vulnerable to crop failure. Food supply instability can trigger social unrest and threaten national security. Large countries must consider these impacts in their agrarian policies, especially in the context of globalization. Mass migration is another inevitable consequence of climate change. Many communities have been forced to leave their homes due to natural disasters or a decline in the quality of life. This phenomenon is known as climate refugees. Population movement can increase pressure in destination countries, worsen social and economic conditions, and trigger xenophobia or discrimination. Europe and North America, as major migration destinations, must prepare to face this challenge. Energy security is also affected by climate change. The share of renewable energy is increasing along with global efforts to reduce carbon emissions. However, this rapid transition could create instability, especially in countries dependent on oil and gas. Tensions can arise between energy-producing countries as demand and market structures change. It is important for the international community to recognize the link between climate change and global security. Holistic policies are needed to address this problem. Cooperation between countries, development of green technology, and protection of human rights for climate refugees are imperative. Efforts to fight climate change are not only about the environment, but also protecting world security and peace. Through a proactive approach, as well as support from various parties, we can mitigate the impacts of climate change and reduce the risks it faces. Decisions taken today will determine the quality of life for future generations and global stability in the future.