Greg Craven (teacher)

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Greg Craven is an American high school science teacher and climate change author. The creator of a 2007 viral video on YouTube, he is also the author of a 2009 book on the climate change debate.


Craven grew up in Silverton, Oregon, and graduated from the University of Puget Sound in Tacoma, Washington.[1] In 2007, when he was a science teacher at Central High School in Independence, Oregon, Craven posted the nine and one-half minute The Most Terrifying Video You'll Ever See[2] on YouTube. The video presented a simplified version of risk management using a 2x2 grid to sketch out possible scenarios based on: a) whether we choose to take action or not, and b) whether global warming turns out to be a threat or not. Using the grid, Craven concluded that taking action to combat climate change was the better choice, given the relative risks.

In the first six months online it garnered four million hits, and prompted Craven to spend six weeks creating 44 follow up videos totaling over seven hours detailing specifics of risk management applied to climate change.[3] Craven's conclusion was that "the risk of not acting far outweighs the risk of acting."[4] Craven was the focus of some media attention,[5] was named "Featured Teacher" by WIRED Science,[6] and received criticism by climate change denialists. In 2009, Craven published the book What's the Worst That Could Happen?: A Rational Response to the Climate Change Debate.[7]

At the annual Fall Meeting of the American Geophysical Union (AGU) in 2010, Craven delivered a speech[8] (and subsequent comments during a panel discussion) exhorting the climate science community to become personally involved in the public debate over climate change. Craven's comments caused some negative attention in denialist climate blogs, which argued that Craven was "the face of the 'New AGU.'"[citation needed] This prompted Craven to publish a clarification taking personal responsibility and emphasizing that his remarks were in no way associated with the AGU organization or its official view.[9]


  • What's the Worst That Could Happen?: A Rational Response to the Climate Change Debate, Perigee Trade, 2009; ISBN 978-0-399-53501-7