However, there are also positive consequences. Many peoples around the world continue to live near volcanoes because the eruptions produce wonderful soil for growing crops. Most of the surface of the North American continent itself was produced by the eruption of volcanoes over millions of years. The atmosphere of the Earth got much of its components from the eruption of volcanoes. Even tourism can be positively affected. Pompeii is a very popular tourist site because of the information preserved there by the eruption of Vesuvius.
For example, volcanic ash blown over thousands of square kilometers of land increases for ...