PURDUE UNIVERSITY IMAGE: NUSRAT JUNG, A PURDUE ASSISTANT PROFESSOR OF CIVIL ENGINEERING, REVIEWS DATA SHOWING THE CHEMICALS EMITTED INTO THE AIR FROM USING A HAIR STYLING TOOL. CREDIT: PURDUE UNIVERSITY PHOTO/DREW STONE The average morning routine for many Americans includes inhaling several milligrams of chemicals that may be harmful to their health, Purdue University researchers...