The Honda FCX Clarity went into production in June 2008 with Honda calling it the world’s first hydrogen-powered fuel-cell vehicle intended for mass production. During its appearance at the New York Auto Show it took home the World Green Car award on this day in 2009, after more than 15 years of development. Fuel-cell vehicles work by combining hydrogen and oxygen to generate electricity, resulting in emissions of only water and heat. In July 2008, when the Clarity was ready for the market, Honda chose to lease them to consumers for about $600 per month, as the retail price would be in the $200,000 range due to the high production costs. Today they can be purchased for about $60,000.