Volcanoes are mountains that have formed when hot molten rock (magma) and ash escape from an opening in the Earth’s surface. There are around 1,500 volcanoes on Earth, and around 50-70 are erupting at any one time. The molten rock and ash can form rivers of lava, explosive ash clouds, and lahars.
Volcanoes can affect people in a number of ways. They can cause injuries and fatalities, damage property and infrastructure, and produce hazardous gases and ash. Volcanoes can also …