Timothy Lee, NASA Ames Research Center (IMAGE) Purdue University Caption Some common chemical molecules, most of them used industrially, may be more worrisome from a global warming perspective than carbon dioxide, according to a new study by Timothy Lee, chief of the Space Science and Astrobiology Division at NASA Ames Research Center. The study was collaboration between Lee and Joseph Francisco, a Purdue chemistry and earth and atmospheric sciences professor. Credit Photo courtesy of NASA Ames Research Center Usage Restrictions None 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.