Volcanoes

More than 80% of the earth's surface is of volcanic origin. As population density continues to increase in volcanic regions, it becomes more important to make the public aware of the the hazards of active or potentially active volcanoes and of the necessity of living in harmony with them and planning for periodic unleashing of their pent-up energy. This report presents a generalized summary of the nature, workings, products, and hazards of the common types of volcanoes around the world, along with a brief introduction to the techniques of volcano monitoring and research. Photos and maps.