ClimateWire: The 2-degree-Celsius temperature rise limit globally accepted as a means to avoid dangerous climate change is a "mathematical aggregate" and a mere average of data collected from hundreds of climate stations around the world and thrown into climate models to forecast the effects of climate change. It fails to protect those nations most at risk, according to Petra Tschakert, a professor at Pennsylvania State University and coordinating lead author of the Intergovernmental Panel on Climate Change's...