Converting methane (IMAGE) Iowa State University Caption Iowa State chemical and biological engineers Yue Wu, professor, right, Xiaopeng Liu, doctoral student, left, and Fan Yang, postdoctoral research associate, center, are part of the team that's developed a catalyst that converts a greenhouse gas into chemicals used to make plastics and other materials. Credit Photo by Christopher Gannon/Iowa State University Usage Restrictions None License Original 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.