Since the Industrial Revolution, people have been pumping all manner of pollutants into the air, and atmospheric chemist Lyatt Jaeglé has spent her career trying to figure what that means for the composition of atmosphere. Through a combination of modeling and observations, she studies how human activity - from automobile exhaust, power plants, industry, agriculture - affects surface air quality over populated regions. She is also interested in how these pollutants are spreading in the atmosphere to reach downwind continents and remote regions such as the Arctic. She has received several awards throughout her career for her work, including both the prestigious NSF Faculty Early Career Development Award, and a NASA New Investigator Award.