AdvertisementIt's Not Easy, But Aspen Moves Toward 100 Percent Renewable Energy03:46Download AudioResumeJuly 05, 2017Grace HoodfacebookEmailIn 2015 Aspen, Colo., reached 100 percent renewable energy powering of its electric utility. "Getting the last 25 percent was a huge challenge for us," says Aspen Mayor Steve Skadron. (Colorado Public Radio)