Sorry, Your Houseplants Aren't Actually Purifying Your Apartment's Air Salon February 3, 2020 Research by Michael Waring, PhD, an associate professor in the College of Engineering, andBryan Cummings, a doctoral candidate in the College, showing that houseplants do not contribute to improving indoor air quality, was featured in a Feb. 3 Salon story. View Story Topical Tags: College of Engineering environmental engineering Share Related