Arthur B. Weissman, Ph.D., is an environmental professional with over thirty-five years of experience. As President and CEO of Green Seal, he has led the organization both as a force to promote the green economy and as the premier nonprofit certifier of green products and services in the United States. Dr. Weissman joined Green Seal in 1993 as Vice President of Standards and Certification, becoming President and CEO in late 1996, and he served as founding Chair of the Global Ecolabelling Network from 1994 to 1997. He oversaw the development of Green Seal's standard for lodging properties (GS-33) in 1999 and the certification of scores of properties to that standard since then. Prior to joining Green Seal, he was responsible for developing national policy and guidance for the Superfund program at the U.S. Environmental Protection Agency. He also served as a Congressional Science Fellow and worked for The Nature Conservancy in Connecticut. He holds a Ph.D. from Johns Hopkins University in physical geography and environmental science, a masters in natural resource management from Yale School of Forestry and Environmental Studies, and a bachelors degree from Harvard University. His book, In the Light of Humane Nature, was published in 2014. In it he traces the development of the green economy against the backdrop of increasing environmental degradation, arguing that our attitude toward nature must fundamentally be a moral one in order to achieve “environmental salvation” and a sustainable world. His other interests include family, classical music and piano, hiking, birding, reading, and writing.