1. Impact on global climate: A large amount of volcanic ash and volcanic gas emitted during volcanic eruption have a great impact on the climate.
2. Damage to the environment: A large amount of volcanic ash ejected by volcanic eruption combined with heavy rain will form debris flow, which can destroy roads and bridges and flood nearby villages and cities.
3. Triggering a tsunami: submarine volcanic eruption will trigger a tsunami, posing a threat to residents near the coastline.
4. Causing earthquakes: Volcanic lava flows from land volcanoes can burn everything, not only changing the topography, but also causing secondary disasters such as earthquakes.
5. Air pollution: Volcanic eruption will release a lot of harmful gases, including sulfur dioxide, nitrogen and carbon monoxide. These gases will affect the air quality.
Methods to reduce the harm of volcanic eruption
1. Establish an early warning system: By establishing a volcanic early warning system, we can predict volcanic activity in advance and take timely measures to reduce the losses caused by volcanic eruption.
2. Evacuate people: Before volcanic eruption, evacuate nearby residents in time to avoid casualties caused by volcanic eruption.
3. Application of science and technology: Using science and technology, such as satellite monitoring, geological survey and other means, strengthen the monitoring and prediction of volcanoes, and keep abreast of volcanic activity information.
4. Take protective measures: When a volcano erupts, take necessary protective measures, such as wearing helmets and goggles, to reduce the harm of volcanic ash and gas to human body.
5. Strengthen international cooperation: All countries should strengthen cooperation, jointly study the laws of volcanic activity, share experience and information, and jointly deal with volcanic disasters.