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Every day, the Chicago Department of Aviation (CDA) strives to make our airports more sustainable, just as we seek to improve the passenger experience for the 100 million people who fly through O’Hare and Midway International Airports each year.

With over 8,000 acres under our care, to make a big impact on the environment, we often need to take big actions. Actions like, building a 218-foot tall, LEED-certified Gold Air Traffic Control Tower; installing geothermal systems; replacing all parking garage lights with energy-saving LED bulbs; adding new electric car charging stations to a travel plaza; and hosting national sustainability conferences.

Yet, as we round out our 2019 Earth Week celebrations, we’d also like to acknowledge a few of the smaller—and cuter!—actions we take to make our airports both more sustainable and more pleasant for the people who work here day after day.