GLOBAL TEMPERATURES AVERAGED BY DECADE
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FIGURE 14.20 Plotting global temperature changes since 1880 as decadal averages removes annual fluctuations in the record, revealing clearly the record-breaking temperatures of the 1980s, 1990s, and 2000s. (After 2009 State of the Climate Highlights, www.ncdc.noaa.gov/bams-state-of-the-climate.)