BY THE OPTIMIST DAILY EDITORIAL TEAM
Chicago entered 2024 with a landmark achievement: every one of its 411 municipal buildings, from City Hall to local libraries, now runs entirely on renewable energy. This monumental shift comes as part of the city’s broader climate strategy and has been hailed as a model for sustainability nationwide.
“Every Chicagoan interacts with a city-owned building,” said Angela Tovar, Chicago’s chief sustainability officer, speaking to the Chicago Tribune. “To be able to achieve this milestone on behalf of city residents is exciting.”
The transition is powered by a five-year power purchase agreement (PPA) signed with energy supplier Constellation in 2022, securing a steady flow of clean energy for city operations.
The power behind the transition
At the heart of this transformation is the Double Black Diamond solar farm, a 4,100-acre renewable energy facility located in central Illinois. Operated by Swift Current Energy, it is the largest solar farm east of the Mississippi River and supplies 70 percent of the 900,000 megawatt-hours of electricity consumed annually by Chicago’s municipal buildings.
The remaining 30 percent comes from renewable energy credits (RECs) provided by Constellation. These credits allocate funding from Chicago’s energy bills to clean energy projects across the United States, helping the city bridge the gap while exploring local renewable projects.
“This plan gets the city to take action on climate and leverages our buying power to generate new opportunities for Chicagoans and the state,” Tovar told Grist.
PPAs like Chicago’s are increasingly popular for municipalities aiming to embrace renewable energy without the hefty upfront costs of building their own infrastructure. By partnering with a third-party operator, cities like Chicago reap the environmental benefits while encouraging private-sector investment in clean energy.
Cutting carbon, creating opportunity
The shift to renewable energy is expected to cut Chicago’s carbon emissions by approximately 290,000 metric tons annually—the equivalent of removing 62,000 cars from the road. Beyond the environmental impact, the initiative creates economic opportunities, including a $400,000 annual commitment from Constellation and Swift Current Energy for clean energy job training programs.
But the plan is not without its critics. Some have voiced concerns over the use of RECs, arguing they might represent greenwashing rather than direct contributions to local clean energy generation. Addressing this, Deputy Chief Sustainability Officer Jared Policicchio emphasized the city’s long-term vision.
“Our goal over the next several years is that we reach a point where we’re not buying renewable energy credits,” he told Grist.
In the meantime, the city is exploring solar panel installations on its buildings to further bolster its renewable capacity.
Leading the renewable revolution
Chicago’s leadership in renewable energy joins a growing trend among municipalities across the U.S. Over 700 cities have committed to similar agreements, generating enough clean energy to power 4 million homes annually, according to the World Resources Institute.
Looking ahead, Chicago aims to expand its clean energy transition beyond municipal buildings. The city has set an ambitious target to power all buildings within its limits entirely by renewables by 2035. If successful, it would make Chicago the largest U.S. city to achieve this milestone.
“This isn’t just about powering buildings,” Tovar said. “It’s about setting a standard for what cities can accomplish when they prioritize sustainability and equity.”
