El Hierro is the smallest of the Canary Islands (a chain of Spanish islands off the coast of Africa), and it is incredibly beautiful. Previously its mainly been known as a sheik and exotic European tourist mainstay. Now, it's becoming famous for something a bit more virtuous as part of the eco crazy revolution----it is the world's first island to run on 100% renewable energy. This small island is basically a blueprint for a sustainable future on planet earth. We will travel to the island and get a look at el Hierro's design, something that may just end up saving the world.