Carl Elefante is Principal Emeritus with Quinn Evans architects. Known for coining the phrase: “The greenest building is one that is already built”, Carl writes and lectures internationally on historic preservation, sustainable design, climate change, and urban topics. He is the author of Going for Zero: Decaronizing the Built Environment on the Path to Our Urban Future. He was President of the American Institute of Architects (AIA) in 2018. His recent academic appointments include serving as Adjunct Professor at The Catholic University of America, Paul H. Kea Distinguished Professor at the University of Maryland, and Senior Research Associate with the Michael Christopher Duda Center at the University of Notre Dame. Carl is a member of the College of Fellows in both AIA and Association for Preservation Technology International (APT).