EcoGeek, one of my favorite eco-blogs, writes about a German company called SkySails, a retrofit of a giant sail that can be applied to ships over 80-feet in length and theoretically can reduce fuel consumption anywhere from 10% to 30%. Considering how fuel costs are forcing Matson and other shipping lines serving Hawaii to raise prices that are being passed on to consumers, creating a state tax credit for something like this might be an interesting way to entice adoption and, if it works, save Hawaii consumers money while improving the environment. Nice, eh?