CHAMPAIGN, Ill. — On Tuesday, President Trump’s administration proposed revoking the U.S. Environmental Protection Agency’s “endangerment finding,” a 2009 scientific finding that underpins U.S. policy on greenhouse gas emissions. By identifying the gases as a threat to public health and welfare, the finding provides the basis for many emissions regulations. Donald Wuebbles, a professor emeritus of climate, meteorology and atmospheric sciences at the University of Illinois Urbana-Champaign, has been a leader of numerous national and international climate assessments, including the Intergovernmental Panel on Climate Change. He also served as an assistant director in the U.S Office of Science and Technology Policy under President Obama. Wuebbles discussed the proposed repeal of the endangerment finding and its implications for policy and the environment with News Bureau biomedical sciences editor Liz Ahlberg Touchstone.