Gazette: In contrast with a strengthening consensus among Iowa scientists, the states political leaders remain divided along party lines about the role of human activity in climate change. Iowas climate will likely continue to warm due to increasing emissions of heat-trapping gases, said this years Iowa Climate Statement, signed by 155 Iowa scientists, up sharply from the 44 who signed the 2011 statement. Chris Anderson, assistant director of the Iowa State University Climate Science Program and a...