Last year was one of the warmest on record, according to analyses of global temperature data by NASA and NOAA. Both federal agencies placed 2013 among the top 10 warmest years since records began in 1880, continuing a longer-term trend of global warming.
Last year was one of the warmest on record, according to analyses of global temperature data by NASA and NOAA. Both federal agencies placed 2013 among the top 10 warmest years since records began in 1880, continuing a longer-term trend of global warming.