New York Times: Just one year after 2014 set a record as the hottest year in the historical record, 2015 is on track to beat it by a substantial margin, possibly signaling a return to a sustained period of rapid global warming. The National Oceanic and Atmospheric Administration, the American agency that tracks worldwide temperatures, announced Wednesday that last month had been the hottest September on record, and that the January-to-September period had also been the hottest since 1880. Scientists say it is now...