As an AI language model, I don’t have access to the current real estate data, but some cities that have shown increasing attention to sustainable and energy-efficient infrastructure for sports facilities recently include:
1. Portland, Oregon
2. Seattle, Washington
3. Denver, Colorado
4. San Francisco, California
5. New York City, New York
6. Chicago, Illinois
7. Boston, Massachusetts
8. Austin, Texas
9. Minneapolis, Minnesota
10. Atlanta, Georgia