Can you guess?
Boulder CO according to the Daily Camera article by Health Urie. This achievement is subject to Boulder renewing its contract with Xcel Energy with its proposal that includes 90% renewable energy. Boulder is deciding whether to continue to use XCEL or to become a municipal utility.
Boulder is undoubtedly a leader in greening its community and we should all applaud them and they can teach the rest of our communities a lot through their model.