David Scott Mathieson is a senior researcher in the Asia division of Human Rights Watch. He is an expert on Burma/Myanmar and the Rohingya. Contact via Emma Daly, HRW’s communications director.

Ba Sein is a Rohingya Muslim and a blogger at Rohingya Blogger, which has become a clearinghouse of information, news and resources concerning the Rohingya. He is based in the United Kingdom. Contact via Nay San Lwin.

Greg Constantine is an American photographer currently based in Southeast Asia. He has spent years documenting the plight of the Rohingya, visiting them at refugee camps and following them on their migration. His work can be seen in Exiled to Nowhere: Burma’s Rohingya, a book and website of his work.

Valerie Hoffman is the head professor in the department of religion at the University of Illinois in Champaign, and the former director of its Center for South Asian and Middle Eastern Studies. She is an expert on Islam and in 2012 organized and participated in a conference on the Rohingya at the center.

Wakar Uddin is director general of the Arakan Rohingya Union, an umbrella organization of Rohingya advocacy groups worldwide. He is also a professor of plant pathology and microbiology at Penn State University.

Neil Ormerod is a professor of theology at Australian Catholic University in Sydney, New South Wales, Australia. He is director of its Centre for Catholic Thought and Practice. Anticipating Pope Francis’ environmental encyclical, he called it “a landmark in Catholic social teaching.”

Bill Patenaude is a special lecturer of theology at Providence College in Rhode Island. He is the chief author of Catholic Ecology, where he has speculated about what Pope Francis’ encyclical might contain. Contact via Chrissy Centazzo.

Riccardo Cascioli is the author of Lies of the Environmentalists and has criticized Pope Francis’ involvement in climate change, which Cascioli sees as a wedge into changing Catholic doctrine about the sanctity of life. He is also the editor of La nuova Bussola Quotidiana, an Italian Catholic news and opinion site.

Marc Morano is executive director of ClimateDepot.com and communications director at Committee for a Constructive Tomorrow, a conservative think tank in Washington that is skeptical of man-made climate change. He has been critical of Pope Francis’ involvement in climate change issues and his reliance on United Nations climate change data.