David Allen is the author of seven books and more than 300 papers, primarily in the areas of air quality, greenhouse gas emissions, the engineering of sustainable systems, and the development of materials for environmental and engineering education. He served on a variety of governmental advisory panels and, from 2012 to 2015, chaired the US Environmental Protection Agency’s Science Advisory Board. In 2017, he was elected to the National Academy of Engineering (Section 3: Chemical Engineering) and in 2020 he received the ENI Energy Transitions Award in recognition of his work on methane emissions from oil and gas systems. Professor Allen earned his BS in chemical engineering from Cornell University in 1979 and his MS and PhD degrees in chemical engineering from the California Institute of Technology in 1981 and 1983, respectively.