This means "what benefits does the volcanic activity have for the population?" I would say that the main benefit of continental volcanic activity is the expulsion of ash which can enrich the soil and in the tropics make it good for growing coffee, for example, as it does in El Salvador.
Once heat from the sun penetrate the Earths atmosphere, the heat is circulated as warm air rises and cold air sinks,this process is called <u>convection.</u>
