describing hesitation between climate facts and actions (yellow in Figure 4).
After examining every associated node in the red cluster in 2012, we suggest that the hashtag
“2012” in the top right-hand corner, which is the only event-based hashtag, can provide another
hint about why the associations related to temperature and extremeweather signiﬁcantly increased
in 2012. The Maya inscriptions about the end of the world in December 2012 were prevalent then,
and even inspired a famous American disaster ﬁlm named “2012”, telling a story that the earth
would be destroyed by a series of disastrous extreme natural events. Previously, historians focused
on the correlations between climate issues and the collapse of the Mayan civilization [96,97], but no