Pine, Orange, Lavender... What Should 'Clean' Really Smell Like? WHYY-FM/Newsworks.org April 30, 2015 Michael Waring, PhD, an associate professor in the College of Engineering, was featured in an April 30 WHYY/Newsworks story about his research on the effects of scented cleaning products on indoor air quality. View Story Topical Tags: College of Engineering Share Related