This graph illustrates the change in the earth’s annual surface temperature (combined land and sea temperature) over the last 139 years, from 1880-2019, relative to 1951-1980 average temperatures. Nineteen of the 20 warmest years have occurred since 2001, with the exception of 1998. The year 2016 ranks as the warmest on record.
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Data source: NASA's Goddard Institute for Space Studies (GISS). Credit: NASA/GISS