Washington Post: Even as some experts are questioning the extent to which its even possible, more and more voices at the U.N. climate change conference here are standing up for at least trying to keep global warming below 1.5 degrees Celsius above pre-industrial levels, rather than the more commonly cited 2 degrees C.
Its a dizzying goal: The world is already at about 1 degrees Celsius of warming, with about 400 parts per million of carbon dioxide in the atmosphere and concentrations growing by around two parts...