Saul Griffith, an engineer in San Francisco and a MacArthur 'genius' grant winner, has created a cargo bike that gets the equivalent of 1,500 miles to the gallon. In this video from NOVA Online he explains how he is trying to improve life by reducing his carbon footprint and developing energy creation technologies like the cargo bike. In his opinion, being an engineer gives him job security. He says, "Everyone else is worried about their jobs. If you are an engineer you look at the world and say, 'Wow, there is a lot of broken stuff to fix'."