Volcanoes fertilize the land, but they can also destroy cities, change the climate on continents, and cause widespread famines. Can humans control them?
It's impossible to predict when a volcano will erupt, no matter how long it has been dormant. This is what happened in Indonesia. The viscosity of the lava also affects the formation of the crater, and thus its degree of danger. How is that possible?
Japan is located in a volcanically active area, and scientists fear that a major eruption of two of the world's most dangerous volcanoes could affect the entire world.
Perhaps the biggest lesson from volcanic eruptions is that humans cannot control them because they will destroy them, and the only solution is to stay away from the places where they erupt.