At its opening, the exhibit contained a waste-to-energy gasification system that allowed organic waste (i.e. uneaten food, animal waste, etc...) to be burned in an oxygen-deprived environment in order to create energy. The system powered outdoor hot tubs for the elephants and Denver Zoo's goal was to be "Zero Waste" by 2020, powering the whole facility with waste. Those involved with the project reported that no adverse byproducts would be released when the system was running but several surrounding residents were concerned that the gasification process would create an unpleasant odor around the zoo. These concerns resulted in ending the gasification project at Denver Zoo. Since the decision in 2015, the zoo is seeking partners to continue the project with offsite.