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But sudden, surprising, high-profile focusing events seem to have some potential.“A single speech, at a very opportunistic time, at the Oscar ceremony, resulted in the largest increase in public engagement with climate change ever,” John Ayers of San Diego State University told The Washington Post about the findings, which also insists grassroots are needed in addition to celebrities with causes. Lecturing people about climate change (or anything else) often doesn’t work. But it’s another interesting counterexample to the general, well-supported idea that awareness is overrated - on top of similar work some of these same researchers have done about awareness days and Charlie Sheen’s HIV announcement. This is not, of course, a substitute for real action on climate change. But what’s interesting about search spikes of this magnitude is that even if only a tiny percentage of the searchers and tweeters go on to do something, or to learn more about climate change, that’s a lot of bang for the buck for a couple of minutes’ worth of an acceptance speech. The pessimistic way to look at this is to say: So what? People search for stuff all the time and it doesn’t necessarily translate to action. This increase was 3.8 and 4.3 times larger than the increases observed during COP’s daily average or on Earth Day. At the same time, Google searches for “climate change” or “global warming” increased 261% (95% CI, 186–335) and 210% (95% CI 149–272) the day DiCaprio spoke and remained higher for 4 more days, representing 104,190 and 216,490 searches. As the researchers explain, running down their primary findings (“ CI” means “confidence interval,” and you can basically ignore it here): In practical terms the “DiCaprio effect” surpassed the daily average effect of the 2015 Conference of the Parties ( COP) and the Earth Day effect by a factor of 3.2 and 5.3, respectively. The same effect was seen with Google searches.
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Perhaps unsurprisingly, the internationally covered COP generated more news, but DiCaprio’s speech led to an explosion on Twitter. Here are graphs showing Twitter and news activity: The research team, led by Eric Leas of the University of San Diego School of Medicine and John Ayers of San Diego State, tracked Googles searches, news articles, and Twitter activity related to climate change in the wake of DiCaprio’s speech, comparing those numbers to what they looked like during two events that might be expected to suddenly jerk the number of climate-change-related content upward: the U.N.’s 2015 Conference of the Parties ( COP) climate-change negotiations and Earth Day. Except according to a new paper published in PlOS ONE, DiCaprio’s speech caused immediate, giant spikes in climate-change-related tweets and Google searches - spikes that may well translate to at least a bit of real action and education. “It is the most urgent threat facing our entire species, and we need to work collectively together and stop procrastinating.” It was: “Climate change is real - it is happening right now,” he said. Back in February, after Leonardo DiCaprio finally nabbed his elusive first Oscar for his role in The Revenant, he dedicated about half of his acceptance speech to the subject of climate change.