A new survey by IPCC authors reveals doubt and hope that the world will reach climate

How hot will it be? This is one of the most important and difficult remaining questions about our changing climate. The answer depends not only on how sensitive our climate is to greenhouse gases, but also on how much carbon dioxide (CO2) and other greenhouse gases we choose to emit as a civilization in the coming decades.

To help think more clearly about this question, we asked authors who contributed to the Intergovernmental Panel on Climate Change (IPCC) reports to share their best guesses about where the world is headed. ( Seth Wynes, University of Waterloo, H. Damon Matthews, Concordia University, more at theconversation.com)