This session offers a three-part consideration of healthy materials. Part 1 investigates why built environment professionals should and do care about this growing topic of concern, and explores the history of chemicals of concern, their prevalence within the built environment, and what we have done to date to combat their unintended consequences. Part 2 explores the overlap between LEEDv4, the Living Building Challenge, and the new WELL Building Standard, particularly in regard to indoor air quality and materials procurement. Part 3 rounds out the discussion with a look at what leaders in this new realm of practice are doing to achieve their goals innovatively and inspirationally.