It is no secret hybrids have been built for fuel economy, and to reduce our carbon foot print by emitting fewer emissions out the tailpipe also. But what actually makes them so darn “green”? In my personal quest to uncover all the cool things about hybrids and in personally owning a 2007 Toyota Prius, I have discovered that just about everything on my car in some way was engineered for optimal fuel economy. Tires are no exception.