It started as a little homemade movie about climate change, and 7.5 millions views later, Greg Craven's climate change project has garnered a book deal and millions of fans.

In the video that started it all, Craven, a high school science teacher, spoke plainly and logically about climate change with a simple premise: It's not about knowing what's going to happen, it's about looking at the various possible outcomes and making an informed decision. Craven is smart, logical, nonpartisan, and engaging. He'll remind you of your best college professors, whether they were ecologists, philosophers, historians, or political scientists. He's a bit of all four. Check out Craven's video on the issues we face surrounding climate change and see for yourself:

What do you think? Is Craven right? If so, you know what to do: Spread the word!