John Grim is a senior lecturer and senior research scholar at the Yale School of Forestry and Environmental Studies at Yale University in New Haven, Conn. Grim earned his doctorate in the history of religions and is a co-author of Ecology and Religion.

Walter Grazer is a Washington-based consultant for the National Religious Partnership for the Environment, the Evangelical Environmental Network and the Coalition on the Environment and Jewish Life. He served as director of the Environmental Justice Program for the U.S. Catholic Conference of Bishops from 1993 to 2007. Grazer is the author of Catholics Going Green: A Small […]

Tobias Winwright serves as an associate professor of health care ethics and is an associate professor of theological ethics at St. Louis University. He is a Roman Catholic moral theologian who has co-authored After the Smoke Clears: The Just War Tradition and Post War Justice, and he edited Green Discipleship: Catholic Theological Ethics and the Environment.

Global Catholic Climate Movement is an international organization that helps coordinate the work of more than 650 smaller Catholic groups and congregations concerned about the environment and climate change. They describe Laudato Si’, Pope Francis’ encyclical on the environment, as their founding document.

Christiana Peppard is an assistant professor of theology, science and ethics at Fordham University in New York City. Her focus is on clean water and ideas of nature and man. She is the author of Just Water: Theology, Ethics and the Global Water Crisis and teaches classes on human nature and Darwin, theology and science, American religiosity, […]

Cardinal Peter Turkson is a Catholic cardinal from Ghana and president of the Vatican’s Pontifical Council for Justice and Peace. He worked with Pope Francis on the writing of the encyclical and delivered several speeches in advance of its publication that are believed to give a glimpse into its contents.

Michael Peppard is an assistant professor at Fordham University in New York City.

Austen Ivereigh is a U.K.-based writer, journalist and commentator best known for his books on and with Pope Francis, and for his role in the media explaining the convictions of the Catholic Church. He is Fellow in Contemporary Church History at Campion Hall, Oxford, and a regular contributor to The Tablet, America magazine and Commonweal, […]

Veerabhadran Ramanathan is a distinguished professor of atmospheric and climate sciences at the Scripps Institution of Oceanography at the University of California, San Diego, and an “ordinary academician” at the Pontifical Academy of Sciences in Rome. His work is expected to have contributed to Pope Francis’ encyclical.