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In recognition of the efforts of cities across the country to provide energy-efficient, least polluting and healthy living spaces, the Green Guide presents the environmental leaders, those cities whose green achievements set the standard for others. As The New York Times has reported, in the absence of federal direction, cities across the country are taking environmental stewardship into their own hands and reducing their burden on the planet.

We asked cities with populations over 100,000 to complete our survey and, in combination with environmental data we gathered from government sources, scored cities on an eleven-point scale. Our results are below and for more information about our criteria, see "What Makes A City Green?"

Highlights of the Top 25 Green Cities

1. Eugene, OR (score 9.0375, pop. 137,893)

- Sustainable business incubator

- Renewable energy supplying 85% of city's power

- Extensive wetlands program

2. Austin, TX (score 8.5325, pop. 656,562)

- Green Builder program

- Smart growth initiative

- Committed to solar power

3. Portland, OR (score 8.24, pop. 529,121)

- Green building

- Excellent public transport

- Smart growth

4. St. Paul, MN (score 7.805, pop. 287,151)

- Green space makes up a quarter of urban area

- Significant greenhouse gas reductions

- Affordable housing

5. Santa Rosa, CA (score 7.785, pop. 147,595)

- Green building program

- Clean air and water

- Bicycle paths and lanes

6. Oakland, CA (score 7.3675, pop. 399,484)

- Building local food production

- Green building ordinance

- Public transport

7. Berkeley, CA (score 7.285, pop. 102,743)

- Green building requirements for municipal construction

- Well used public transport system

- Community gardens

8. Honolulu, HI (score 7.055, pop. 371,657)

- Clean air and water

- Biomass power generation

- Green building standards

9. Huntsville, AL (score 7.035, pop. 158,216)

- Green space makes up one-third of urban area

- High public transport use

- Excellent public education program

10. Denver, CO (score 7.0325, pop. 554,636)

- Greenprint Denver, sustainability initiative

- Large hybrid municipal fleet and nation's largest light rail system

- Clean water and access to wilderness