There’s More To COVID Safety Than 6 Feet of Social Distance. Here’s What Else To Consider. The Philadelphia Inquirer September 2, 2020 Charles Haas, PhD, LD Betz professor of Environmental Engineering in the College of Engineering, was quoted in a Sept. 2 Philadelphia Inquirer story about the science behind assessing and minimizing risk of COVID-19 transmission indoors. View Story Topical Tags: College of Engineering environmental engineering Share Related