Volcano Eruption: Impact on Global Climate Volcanoes are a natural phenomenon that can change the face of the earth in an instant. The eruption of volcanoes, such as Mount Krakatau and Mount Tambora, caused a significant impact on the global climate. When an eruption occurs, material such as volcanic ash and gas is sprayed into the atmosphere, providing short-term to long-term effects that can affect global temperatures. The emitted ash and gases, such as sulfur dioxide (SO2), function as aerosol particles in the atmosphere. These gases interact with sunlight, causing a radiation reflection effect which leads to cooling of the earth’s surface. For example, the eruption of Mount Tambora in 1815 created the “year without a summer” in 1816 in Europe and North America, causing widespread agricultural losses. The impact of the eruption is not only visible in the area around the volcano, but can spread to other parts of the world. After a large eruption, research finds that global temperatures could drop between 0.5 and 1 degree Celsius in the next few years. This results in changes in weather patterns, as well as the possibility of extreme climate phenomena such as floods and drought. Long term, although volcanoes can also contribute to global warming through carbon dioxide (CO2) emissions, the most obvious impact is usually the cooling caused by increased aerosols. For example, the Pinatubo eruption in the Philippines in 1991 added approximately 20 million tonnes of sulfur dioxide to the atmosphere, resulting in a drop in average global temperatures of nearly one degree Celsius over two years. On the other hand, volcanic eruptions also have positive effects on the environment. Volcanic ash is rich in minerals that can improve soil fertility, supporting plant growth in areas affected by the eruption. However, sharp climate change can harm ecosystems that have adapted to certain conditions. In addition, the interaction between volcanic eruptions and climate change also opens up space for further research on how these two phenomena influence each other. A deeper understanding of eruption patterns and their impact on climate can help in predicting future climate change. Monitoring volcanic activity is very important. Scientists have developed an early warning system that can help minimize risks, by utilizing satellite technology to monitor gases and particles in the atmosphere. This approach is not only useful for warning local populations about potential eruptions, but also for understanding long-term impacts on global climate. Climate change resulting from volcanic eruptions also raises ethical and social questions. Communities living near volcanoes must face health risks from ash and dangerous gases, in addition to the resulting social and economic impacts. Discipline in disaster mitigation and community education are important to reduce the uncertainty faced. While research continues, it is important for the world to understand the complex relationship between volcanic activity and climate. The impacts resulting from volcanic eruptions provide valuable lessons about how natural phenomena can interact with the global climate system. Each eruption is a reminder of the power of nature and the need to prepare to face the changes it brings.