Mayor Brandon Johnson, the Department of Environment (DOE), and the Department of Fleet and Facility Management (2FM) announced that the City has achieved its goal of transitioning all City facilities and operations to 100 percent renewable energy. With this step, Chicago becomes one of the largest cities in the U.S. sourcing the power for its operations with renewable energy.  This milestone was officially reached on January 1, 2025, following several years of collaboration between the City, nonprofit partner Elevate, retail electricity supplier Constellation, and Swift Current Energy. The project fulfills a long-term advocacy campaign, Ready for 100, led by Sierra Club and local community organizations, to encourage the City to make the transition to renewable energy. As part of the City’s energy supply agreement with Constellation, 70 percent of Chicago’s renewable energy will come from Double Black Diamond, a new, 593-megawatt solar generation installation developed by Swift Current Energy in downstate Sangamon and Morgan counties. The remaining 30 percent will come from purchased renewable energy credits. For more information about Chicago’s renewable energy initiatives as they progress, visit chicago.gov/chi100.