SiliconBeat

New Orleans has not been a repository of good news this decade, but perhaps the post-Katrina environment is starting to show results.

Jackson Square in New Orleans

Sustainlane.com, a Web green-living guide, evaluated how green the fleets were in America’s big cities, and handed Nawlins the crown. That’s because 100% of its public vehicles are propelled by alternative fuels. That list includes biodiesel, hydrogen, ethanol, CNG, electricity or gas-electric hybrids.

Here is the top 10 list, as well as the percentage of the fleet in each that’s green:

1. New Orleans, 100%

2. Las Vegas, 90%

3. Omaha, 74%

4. Fort Worth, 70%

5. Portland, 60%

6. Colorado Springs, 58%

7. Kansas City, 50%

8. Dallas, 49%

9. Albuquerque, 47%

10. San Francisco, 47%

The national median for green fleet % inthe  50 largest cities is 19.5%. San Jose’s fleet is 34.3% green, according to a SustainLane.com spokeswoman.