The effects of volcanoes can be both positive and negative.
Geothermal energy is when heat from within the Earth is used to generate electricity. Geothermal energy can be generated in areas where magma lies close to the surface. This is good for increasing renewable energy use.
Ash ejected by the volcano acts as a good fertiliser for soils.
Volcanoes attract many tourists, who enjoy the dramatic scenery that they produce.
Volcanoes are dangerous. They can kill people and damage property.
Economic activity can suffer as it is hard for businesses to operate after an eruption.
Habitats and landscapes are damaged by lava flows.