Minneapolis Star Tribune: The nation’s leading climate scientist had a pointed suggestion for policymakers interested in reducing carbon dioxide emissions: no more coal plants. “We need politicians with the guts to say that, but I don’t see that,” said James Hansen, director of NASA’s Goddard Institute for Space Studies, who was in town this week for a speech at the Science Museum of Minnesota in St. Paul. They “say the right words and set goals to reduce emissions, but their actions prove they don’t mean …