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.

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.

Yu Yang co-authored a 2018 study on the relationship between religious beliefs and environmental behaviors in China. Yu works in the department of public administration at Southeast University in Nanjing, China.

Saffet Abid Catovic is a Muslim environment leader. He co-founded Green Muslims of New Jersey and helped launch the Islamic Society of North America’s Green Masjid Task Force. In 2018, he shared his efforts to offset the carbon footprint of his pilgrimage to Mecca with Sojourners.

The Rev. Robert “Bud” Grant is an environmental theology professor and Catholic priest at St. Ambrose University in Davenport, Iowa.

Victoria Loorz is pastor of the Church of the Wild in Oak View, Calif., a faith community that meets in the wilderness and focuses on encountering God through nature.