President Donald Trump has undone or renegotiated many of his predecessor’s environmentally friendly policies, removing climate change research from government websites and pulling out of the Paris climate agreement. Religiously inspired environmental activists have emerged as some of his loudest critics.

David Fisher is the director of Interfaith Appalachia, a nonprofit, interfaith organization that leads service-learning trips to the Appalachian region. He holds degrees in Jewish studies and environmental studies and has researched the intersection of religion, peacemaking and environmental activism.

Gene editing could provide a revolutionary cure for gene-linked diseases. But does it take medicine too far?

John D. Loike is a research scientist in the department of biomedical engineering at Columbia University, focusing on bioethics, stem cells, cloning and the interplay between science and religion. In 2018, he co-authored a study on how to apply Jewish teachings to medical advancements like gene editing.

Rabbi Geoffrey A. Mitelman is the founding director of Sinai and Synapses, an organization that brings together Judaism and science, mostly through the introduction of scientists into synagogue programming. He is based in Westchester County, N.Y.

Rabbi Mark Hillel Kunis has written about Torah portions that support the idea that God created life on other worlds. He lives in Atlanta.

David Weintraub is a professor of astronomy at Vanderbilt University in Nashville, Tenn., and the author of Religions and Extraterrestrial Life: How Will We Deal With It?.

Benjamin Blech is a rabbi and a professor of Talmud at Yeshiva University in New York City. He has written about what the discovery of intelligent alien life would mean to Judaism.

Lesley Sachs is the director of Women of the Wall, an international consortium of Jewish women who want women to be able to pray at Jerusalem’s Western Wall. She lives in Jaffa, Israel.