Greg Craven is a high school science teacher and climate change activist from Oregon. His new book is What's the Worst That Could Happen? A Rational Response to the Climate Change Debate. In this conversation with D.J. Grothe, Greg Craven discusses the youtube video on global warming he created that now has nearly 8 million views. He talks about applying game theory to the "decision paralysis" people have surrounding the global warming debate, using a "decision grid." He explores misunderstandings most people have about the nature of science, and whether or not science can provide certainty about important questions facing society. He emphasizes as a starting point the acknowledgement, whether one is a skeptic of global warming or a "panicked activist," that one could be wrong about global warming. He argues that the evidence is not what is most important in the climate change debate, because each side has "evidence" to support its conclusions. He talks about "confirmation bias," and how it makes it difficult to find out the truth about global warming. He explains why it is less important to personally live "green," and why others kinds of social environmentalist activism is more important. He details why America's mobilization in World War II and also modern social networking on the internet are the only two things that give him hope regarding responsibly responding to climate change.