e-cigarette800 (IMAGE) Desert Research Institute Caption E-cigarettes such as those pictured here emit nicotine and other harmful compounds including formaldehyde, a dangerous human carcinogen. A new study led by DRI's Andrey Khlystov, Ph.D., will study the formation of dangerous compounds by e-cigarettes. Credit Yeongkwan Son/DRI. Usage Restrictions This photo may be used with appropriate caption and credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.