Emerita Professor Jean Bogner has been collaborating with a diverse group of authors on a new report from the National Academies of Sciences, Engineering, and Medicine: Improving Characterization of Anthropogenic Methane Emissions in the United States. Methane is the second most important greenhouse gas emitted in the U.S. after carbon dioxide. Methane also has diverse anthropogenic and natural sources which add considerable complexity to the regional characterization of sources and sinks. The report, issued this past week, summarizes a consensus study on improving U.S. anthropogenic methane inventories through more intensive bottom up (ground-based) and top down (atmospheric) observations and modeling, developing a gridded national inventory as a mechanism to integrate approaches, and launching a nationwide research effort to address current knowledge gaps and incorporate the latest science into the inventory process. Last week, Jean joined other authors in Washington, D.C. to brief governmental agencies which supported the development of this study (EPA, DOE, NOAA, NASA) and congressional aids.