At the recent meeting of the American Association for the Advancement of Science, Stanford researcher Mark Jacobson spoke in a session on renewable energy. Jacobson was in the session because he has developed roadmaps to convert the entire US to renewable energy, primarily wind, solar, hydroelectric, and wave/tidal. His detailed analysis includes looking at costs and benefits, including the obvious benefits to human health from the reduced pollution. But he spent one of his slides showing off a very unexpected benefit: the end of destructive hurricanes.