Reuters: Following are main findings by the U.N.'s Intergovernmental Panel on Climate Change (IPCC) in a report on Sunday saying that time is running out to keep global warming within agreed limits. The 33-page summary, by leading scientists, is meant to guide almost 200 governments which have promised to work out a deal by the end of 2015 to slow climate change. Nations have promised to limit warming to a maximum 2 degrees Celsius (3.6F) above pre-industrial times, seen as a threshold for more heat waves,...