The study looked at the environmental impact of a LEED-certified library in Chicago by analyzing the greenhouse gas emissions associated with building materials and operations. They found that the total emissions were around 817 metric tons, with sensitivity analysis showing that using more recycled materials can help reduce emissions. The study also emphasized the importance of comparing the carbon performance of different building designs to make sustainable choices. This research shows that considering both embodied and operational emissions can help architects and builders create more sustainable buildings.