William P. Brown is a professor of Old Testament at Columbia Theological Seminary. His research interests include ecology, social justice and the dialogue between faith and science.

Hans Joachim Schellnhuber is director of the Potsdam Institute for Climate Impact Research in Potsdam, Germany. He has taken part in numerous international gatherings on climate change, including a 2018 conference with faith leaders.

Cardinal John Olorunfemi Onaiyekan is the Metropolitan Archbishop of Abuja, Nigeria. He took part in a 2018 conference on religion and the environment hosted by Orthodox Ecumenical Patriarch Bartholomew I of Constantinople.

Jane Mellett is a parish pastoral worker in the Archdiocese of Dublin. In 2018, she tweeted every line of Laudato Si’ to President Donald Trump to protest his environmental policies.

Elizabeth Bomberg is a professor of environmental politics at the University of Edinburgh in Scotland. She has studied faith-based activism around climate change and recently published a research study on Christian environmentalists.

Bastiaan Rutjens is an assistant professor of psychology at the University of Amsterdam. He studies what leads to distrust in science. 

Fazlun Khalid is the founder of the Islamic Foundation for Ecology and Environmental Sciences, which seeks to increase environmental activism within the global Muslim community.

Tomás Insua is the co-founder and executive director of the Global Catholic Climate Movement. Insua grew up in Argentina and now lives in Rome. He can be contacted through Reba Elliott, the organization’s communications director.