Earthrace_, the environmentally-friendly speedboat that recently abandoned two attempts to break the round-the-world speed record, has just announced plans to go for it again. The boat, designed and developed by a former oil industry engineer turned environmentalist, runs completely on biodiesel and should have a net zero carbon footprint. A wave-piercing, trimaran hull design helps it slice through the water. And if the swells get too big? Supposedly the boat has the ability to duck through the waves instead of rolling over them.