10 Cities.  “The U.S. is Ready for 100% Clean Energy – 10 Cities Model How to Get There”.  www.cleantechnica.com  9/28/18.  The ten cities are – alphabetically: Columbia SC; Concord NH; Denton TX; Denver CO; Fayetteville AR; Minneapolis MN; Norman OK; Orlando FL; Santa Barbara CA; and St. Louis MO.