They don’t call Hawaii a paradise for nothing. The archipelago lies in the middle of the Pacific ocean and is one of the most remote locations on the planet relative to major population centers. Unfortunately (or fortunately depending on your perspective), the islands are relatively deficient when it comes to traditional energy resources. As a result, islanders are enthusiastic about adopting alternatives like electric vehicles and biodiesel. Biodiesel adoption began early in Hawaii with dive and tour boats in places like Kauai using recycled fryer oil since at least the late-1990s.
Visitors to the islands can use biodiesel off the water as well thanks to Bio-Beetle, a Maui-based car rental company that operates a fleet of 20 vehicles. Aside from a recently added hybrid Prius, the fleet consists of diesel Volkswagens and Jeeps fueled by Pacific Biodiesel. The $49.99-to-$75 a day rental rates are comparable to other companies on the island, but the overall carbon footprint is much lower.
Source Autoblog Green