South Africa’s Archbishop Emeritus Desmond Tutu (80) is one of the world’s leading figures in the fight against oppression.

Fazlun Khalid is recognised as one of 15 leading global eco-theologians and is listed amongst the "500 Most Influential Muslims in the World" by the Royal Islamic Strategic Studies Centre of Jordan.

The Reverend Dr John Chryssavgis, Archdeacon of the Ecumenical Patriarchate, has taught in Sydney and Boston.

Rabbi Soetendorp is an award winning human rights advocate, lecturer, writer, environmental activist and champion of civil society worldwide who is active in a wide variety of progressive, humanitarian and interfaith organizations and initiatives.

His Excellency Kallistos Ware is the Orthodox Metropolitan Bishop of Diokleia.

Rabbi David Rosen CBE is the former Chief Rabbi of Ireland and serves on the leadership of several international interreligious bodies.

Martin is Secretary-General of the Alliance of Religions and Conservation (ARC), an international organisation founded by Prince Philip in 1995.

Andrew is Director of the Oxford Centre for Animal Ethics and a member of the Faculty of Theology at the University of Oxford.

Dr Manazir Ahsan has been Director General of the Islamic Foundation since 1985 and edits the Muslim World Book Review.

Bishop Dominic is President of the Anglican Society for the Welfare of Animals and an honorary Vice President of the RSPCA.

Bishop John read Law at St Peter’s College Oxford and Theology at Cambridge and Durham.

Trinley Thaye Dorje is the 17th Gyalwa Karmapa of the Karma Kagyu tradition of Tibetan Buddhism.

Tony Campolo is Professor Emeritus of Sociology at Eastern University and the founder and president of the Evangelical Association for the Promotion of Education and he supports programs for “at-risk” children.

Bishop Llewellin practised as a solicitor before entering the ministry and studying at Cambridge.

The Reverend Gidi is Director of the South African Council of Churches.

Jonathan Crane, PhD, is the Raymond F. Schinazi Junior Scholar in Bioethics and Jewish Thought at Emory University.

Shi Changhui is the executive director of the China Buddhist Association, the deputy director of Hebei Buddhist Association and director of the Hebei Buddhist Charity Foundation.

Michael Reiss is Pro-Director: Research and Development and Professor of Science Education at the Institute of Education, University of London.

William is associate professor of Philosophical Theology at Austin Presbyterian Theological Seminary.

Abdal Hakim Murad is dean of the Cambridge Muslim College, which trains imams for British mosques. 

Pankaj Jain is the author of the award-wining 'Dharma and Ecology of Hindu Communities: Sustenance and Sustainability' and is Assistant Professor in the Departments of Anthropology and Philosophy & Religion at the University of North Texas.

Gopal is the Director of the Bhumi Project, based at the Oxford Centre for Hindu Studies, which works with Hindu communities globally to encourage good environmental practice.

Father Charles is a Catholic priest, working for the Kenya Conference of Catholic Bishops in Nairobi. He also the Chair of the Kenya Interfaith Network of Action on the Environment.