The boat, which can submarine under waves, was Bethune’s brainchild. The New Zealander developed the idea while working as an oil exploration engineer. “Towards the end of my time there I became increasingly uneasy about our dependence on what is a very finite resource,” he says. Bethune began researching renewable fuels and became a supporter of biodiesel and ethanol.
Earthrace was a five-year project. According to Bethune, it took about a year to decide how to put the project together, another year to attempt to raise funds to get started and a year to build the boat. Earthrace has been in the water for two years now. A 2007 attempt to beat the world record failed.
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