SustainLane surveyed the largest 50 U.S. cities in 2006 as to the percentage of their city vehicles fleets using alternative fuels including biodiesel, hydrogen, ethanol, compressed and natural gas, as well as electric vehicles and gas-hybrid vehicles. Slightly greater weighting was awarded for biodiesel, electric and gas-hybrid vehicles. Las Vegas led the nation with almost 63 percent of its vehicles using alternative fuels, including 450 vehicles using cleaner-burning B20 biodiesel, in addition to using less-polluting compressed natural gas, electric hybrids and zero-polluting hydrogen vehicles. Denver, which ranked sixth in alternative fuel use with 31 percent of its fleet in that category, announced plans in 2006 to convert 100 percent of its city fleet to alternative fuel by the end of 2007. Albuquerque has set a similar goal of a 100 percent alternative-fueled city fleet. Top Ten Alternative Fueled City Fleets 1. Las Vegas (63%)
2. Honolulu (51%)
3. Kansas City, Mo. (45%)
4. Albuquerque, N.M. (42%)
5. Dallas (39%)
6. Denver (31%)
7. Phoenix (28%)
8. Los Angeles (25%)
9. Seattle (25%)
10. Portland, Ore. (25%)
Source: SustainLane 2006 U.S. City Rankings