New York Times: To my eye, perhaps the most important line in the summary of the new report on global warming science from the Intergovernmental Panel on Climate Change is this: By the mid-21st century the magnitudes of the projected changes are substantially affected by the choice of emissions scenario. For decades to come, were locked into generally rising temperatures, with shorter-term temperature shifts* up or down shaped most by natural variability in the system (as with the recent plateau in temperatures)....