At the nonprofit research center, he studies environmental ethics and policy, where he engages in research, writing, public speaking, and consulting. Mr. Jennings’ current roles also include: senior adviser at The Hastings Center, editor-in-chief of “Bioethics,” director of bioethics at the Center for Humans and Nature, lecturer at the Yale School of Medicine, and associate editor of the Encyclopedia of the Anthropocene. In addition, he is the editor of Minding Nature, the Center for Humans & Nature’s online journal.