Volcanoes are used as sources of geothermal energy, with Iceland being a leading country at 78% national energy. Other countries include the US and Indonesia. Geothermal energy is more environmentally friendly and cheaper, but may produce toxic fluids and hydrogen sulfide gas. Olympus Mons is the largest known volcano on Mars, Indonesia has the most volcanoes, and there are 1,900 active volcanoes worldwide.
Volcanoes can be used as sources of geothermal energy, energy that is taken from the Earth’s internal heat beneath the surface of its crust. Iceland is one of the leading countries in the use of volcanoes as an energy source and it is estimated that 78% of the national energy comes from volcanoes. Other countries that use volcanoes as sources of energy include the United States, especially the state of Hawaii, and Indonesia. Geothermal energy produced from the exploitation of volcanoes is thought to be more environmentally friendly than other energy sources, such as fossil fuels, because it emits a sixth more carbon dioxide and is estimated to be 80% cheaper. Possible drawbacks of volcanic energy include the fluids it produces, which may have toxic materials, as well as the production of hydrogen sulfide, a gas that smells like rotten eggs.
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The largest known volcano is Olympus Mons, which is located on Mars and is approximately 16 miles (25.75 km) high.
Indonesia has more volcanoes than any other country – around 130 active – and is estimated to produce around 40% of global resources used for geothermal energy.
There are thought to be 1,900 active volcanoes worldwide.
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