Denver, CO
United States
Latitude: 39.74904
Longitude: -104.95023
Was to burn 750 tons/year of animal waste and trash with a gasification type of incinerator. Was scheduled to be online in December 2015.
Canceled in Sept 2015: "Zoo officials attributed the decision largely to a question of resources and money. They and prominent supporters acknowledged Friday that the system still faced a significant hurdle: getting the thing to work."