December 2015 - The Detroit Zoo has moved to 100 percent renewable electricity to power its Royal Oak campus operations. Detroit Zoo has bought renewable energy certificates (RECs) through ITC Holdings Corp. ITC will supply the RECs from electricity generated by wind farms through 2018. The RECs are Green-e Energy certified.
News Release - Detroit Zoo Goes to 100% Renewable Electricity
News Article - Detroit Zoo Shifts to 100% Renewable Electricity Power In Latest Green Move