One hazard caused by volcanic eruptions with global implications is volcanic ash clouds. When a volcano erupts, it can release vast amounts of ash and gases into the atmosphere. These ash clouds can travel long distances, affecting air travel by disrupting flight paths due to the risk of engine failure from ash particles. Furthermore, volcanic ash can lead to climate cooling by blocking sunlight, as seen in the eruption of Mount Tambora in 1815, which caused the "Year Without a Summer" in 1816, leading to crop failures and global food shortages. This demonstrates how volcanic eruptions can have far-reaching effects on both the environment and the global economy.