text: A number of climate-change metrics have become less alarming over time, ranging from global temperature to hurricanes. Climate models (including that of Hansen at NASAs Goddard Institute) have demonstrably overestimated climate sensitivity to greenhouse gas. But rather than hedge his bets and show humility toward the very complex system he is trying to model, Hansen has called for oil industry executives to be prosecuted and for civil disobedience at coal facilities.