Volcanoes - Worldlife Library Sagebrush Author:Peter Clarkson Volcanoes, which provide humankind with some of the earth's most spectacular visual displays as well as its most catastrophic disasters, are an essential feature of the environment. The ground we walk on, the water in the oceans, rivers, and lakes, and even the atmosphere we breathe all ultimately derive from volcanic eruptions. "Volcanoes" teac... more »hes readers about the natural history of volcanoes and the most famous eruptions, and helps them discover both the direct and indirect effects of volcanic activity.« less