In my opinion The volcano is a natural disaster, a serious one. The explosion of the volcano, to know that the skin of the world we have the heat accumulated inside the volcano is แมกมา, and when it is sprayed from the volcano. We called the lava. When the volcanoes flows lava out, it moves quickly about 50,000 km per hour. Human and animals may not escape this disaster and il causes enormous lost. But volcanic activity to help stabilize the Earth's crust is in equilibrium. I think that the volcanic activity has both advantages and waste.