NASA's Goddard Institute for Space Studies (GISS) claimed 2014 was the warmest year on record, a point emphasized by President Obama. However, GISS Director Gavin Schmidt later admitted there was only a 38% certainty for this claim due to a margin of error of 0.1 degrees Celsius, which exceeds the reported 0.02-degree temperature increase. The discussion questions the accuracy of global temperature measurements dating back to 1880.
