New York is the only city in the United States that has mandated the use of hybrid gas-electric vehicles for its taxi fleet. The old taxis that get less than 25 miles per gallon must be replaced by Oct 1, 2008. The following models have been approved: Lexus RX 400h, Toyota Camry, Toyota Pius, Toyota Highlander, Mercury Mariner, Ford Escape, Saturn Vue Green Line, Chevrolet Malibu and Nissan Altima. It is estimated that 500,000 tons of greenouse gas emissions will be cut each year by this change over. There are approximately 13,000 taxis in New York City. Normally, about 3,000 are replaced each year. (USA Today, 7/18/08)
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