The impact of volcanic eruptions on global climate is very significant and complex. Volcanic eruptions can cause profound changes in the atmosphere and climate, contributing to both global warming and cooling. One of the main impacts of an eruption is the release of volcanic particles, such as ash and sulfur dioxide (SO2), into the atmosphere. When a volcano erupts, volcanic ash and toxic gases are released into the uppermost layers of the atmosphere, causing both short-term and long-term impacts. These particles can increase the reflectivity of the atmosphere, known as albedo. This causes some of the sunlight to be reflected back into space, which has the potential to reduce global temperatures. The most famous example is the eruption of Mount Tambora in Indonesia in 1815, which caused a year without summer in 1816 in the northern hemisphere. The impact of SO2 is different. This gas can form sulfate aerosols in the atmosphere that persist for several years, functioning as a filter that reduces the amount of solar radiation that reaches the Earth’s surface, and produces a cooling effect. However, this effect is temporary, as aerosols will settle and disappear from the atmosphere over time. However, eruptions can also cause warming. After a cooling period, the release of greenhouse gases from volcanic activity and the long-term effects of eruptions can produce warming effects, depending on the amount and type of gas released. In some cases, large eruptions trigger the release of carbon dioxide (CO2) that accelerates global warming, having long-lasting impacts. Apart from that, volcanic eruptions can also influence local weather and climate patterns. For example, changes in atmospheric circulation caused by volcanic activity affect rainfall in the surrounding region. This can result in natural disasters such as floods or droughts, which impact global food security. The extension of the effects of volcanic eruptions to global climate is also influenced by the location and type of eruption. Large volcanoes with significant eruption volumes tend to have more widespread impacts. For example, caldera volcanic eruptions like Yellowstone can affect the global climate broadly, while small eruptions tend to have only local impacts. In the face of threats from volcanic eruptions, understanding their impact on the global climate is important. Further research and ongoing monitoring are urgently needed to predict and manage the risks arising from climate change caused by volcanic activity. Accurate climate modeling must integrate data from volcanic eruptions to create a clearer picture of the relationship between geological activity and climate change. The consequences of volcanic eruptions go far beyond just their direct impact on the environment. They contribute to the complex dynamics of global climate, which impacts the lives of all creatures on Earth. Therefore, it is important to pay attention to and understand these relationships to formulate effective mitigation strategies.