ThinkProgress: In January, the planet continued the warming trend that made 2014 the hottest calendar year on record. NASA reports that last month was the second-hottest January on record (after 2007), while the Japan Meteorological Agency ranked it the hottest.
Significantly, there has never been as hot a 12-month period in NASA`s database as the previous 12 months (February 2014January 2015). This is using a 12-month moving average, so we can "see the march of temperature change over time," rather than just...