Volcanic gases are gases released during volcanic eruptions and from volcanic vents. The most common gases include water vapor, carbon dioxide, sulfur dioxide, and hydrogen sulfide. These gases can be harmful to the environment and human health, depending on their concentration and the distance from the eruption. When a volcano erupts, the pressure inside the magma chamber forces these gases to escape. This release can create ash clouds and influence climate by affecting atmospheric conditions. Monitoring volcanic gases is crucial for predicting eruptions and understanding the behavior of volcanoes and their impact on the surrounding ecosystem.