The Rev. Samuel T. Lloyd III is the priest-in-charge at Trinity Church in Boston, an Episcopal church. He was the ninth dean of the Washington National Cathedral, and he preached from the cathedral’s pulpit about global warming and the need for Christians to act. Email him through the contact form on Trinity Church’s website.

August 1996, Our Planet article by Fazlun Khalid about the Islamic approach to environmentalism. Khalid directs the Islamic Foundation for Ecology and Environmental Sciences.

Rebecca Greenwood is co-founder and president of Christian Harvest International and Strategic Prayer Action Network (SPAN). She is the author of Destined to Rule: Spiritual Strategies for Advancing the Kingdom of God (2007), in which she discusses the role and responsibilities of Christians as “rulers” over creation.

Cassandra Carmichael is the executive director of the National Religious Partnership for the Environment. Previously, she served as director of the National Council of Churches’ Eco-Justice Programs and has written numerous articles on faith and the environment.

Edward Brown is the founding director of Care of Creation, a Christian environmental mission agency based in Madison, Wis. He is the author of Our Father’s World: Mobilizing the Church to Care for Creation.

The Cedar Tree Institute works with organizations, including religious groups, to develop environmental projects in Northern Michigan.

The Alliance of Religions and Conservation is an international secular organization that works to help religious bodies develop environmental stewardship programs. It’s based in Bath, England.

The Unitarian Universalist Ministry for Earth encourages Unitarian Universalists and organizations at all levels to articulate Unitarian Universalist theology, principles and values around Earth ministry and to develop common language to facilitate their environmental justice work.

Presbyterians for Earth Care, formerly Presbyterians for Restoring Creation, is a grass-roots national organization of Presbyterians associated with the Presbyterian Church (USA) who are concerned about the environment and work to support the church’s environmental statements and goals.