Volcanoes have been responsible for the destruction of cities like Pompeii, civilizations like the Minoan and have even caused meteorological changes, as happened in 1816, when the outbreak of the Tambora caused a global drop in temperatures . So it's hard to imagine anything good coming out of a rash. But so it is .
• Agriculture . One of the benefits of living in the shadow of a volcano is that its ashes contain nutrients that convert the soil where they are deposited into fertile places . This is well known to the farmers who live on the slopes of Vesuvius, facing the Bay of Naples.
• Creation of land. The Hawaiian Islands, like the Canary Islands , the Ryūkyū , the Aleutians , Cyprus , Crete or the Antilles , are examples of the formation of new pieces of land due to underwater volcanic eruptions.
• Technology . They provide us with very useful materials: pumice is used to make mortars in construction and to polish metals; the perlite , in the construction, the elaboration of ceramics and in horticulture; diabase and crushed basalt are used on roads, as ballast for railways, in granules for roofs or on breakwaters.
