· "Religious Responses to Global Warming," 14th Annual Interdisciplinary Environment and Community Conference, Saratoga Springs, NY, February 2004.
· "Religion and Global Warming," Aquinas Seminar, Drew University, February, 2004.
· "Faith and Fossil Fuels" Religion and Ecology Group, American Academy of Religion, Toronto, Canada, November, 2003.
· Workshop Presentation: "The Ecological Consequences of Economic Empire," American Empire? Conference, Drew University, September 2003.
· "Protestantism and Ecology," Interfaith Panel and "The Role of Higher Education in Environmental Justice and Sustainability." A Vision for Environmental Justice: Our Responsibility for God's Creation! conference, April 25-27, 2003. Princeton University.
· "Activism is What We Do Everyday," Religion and Ecology Group, American Academy of Religion, Toronto, Canada, November, 2002.
· "Greening Ethnography and the Sociology of Religion," Society for the Scientific Study of Religion, Salt Lake City, Utah, November, 2002.
· "U.S. and Australian eco-spirituality," Environment, Community and Culture, July, 2002, Brisbane, Australia.
· "Saving the Creation". Five day lecture series at the University of Helsinki, Finland, April 2000.
· "Justice for All: U.S. Religious Involvement in the Environmental Justice Movement" Religion and Ecology Group session on Race, Religion, Population and Environmental Justice, American Academy of Religion in Boston, MA, November, 1999.
· Co-organizer of the "Humanity on the Edge: Religion and Science in the Next Century" conference, November 5-6, 1999, at Drew University. Funded in part by the Templeton Foundation.
· Workshop Presentations, Regional Eco-Justice Issues; How Race Matters for Environmental Justice; and Community and Environmental Justice Issues; and Co-organizer, Greening the Church Conference, Drew University, October 1999.
· "Is it Eco-Justice or Environmental Justice? The role of religion in the environmental justice movement," Association for the Sociology of Religion, Chicago, IL, August, 1999.
· Invited presenter, "Materializing Religion: Situating the Science/Religion Interdiscipline" conference, Drew University, May 15-16, 1999.
· Invited speaker, "Turning the Tide" conference, Drew University, May 1, 1999
· "Nature as Rats and Roaches: Eco-justice in an Urban Setting," Religious Life in Newark session, American Academy of Religion in Orlando, FL, November, 1998.
· Invited critic, "Authors-Meet-Critics: A Panel Discussion on Gatherings in Diaspora: Religious Communities and the New Immigration, R. Stephen Warner and Judith G. Wittner, (Editors), Society for the Scientific Study of Religion, Montreal, November, 1998.
· "From Stewardship to Harmony: Christian Stewardship and Creation Spirituality," Society for the Scientific Study of Religion in Albuquerque, NM, November, 1994.
· Discussant, Session on Religion and Ecology, Society for the Scientific Study of Religion in Albuquerque, November 1994.
· "Saving the Creation: Stewardship Theology and Creation Spirituality," Consultation on Religion and Ecology, American Academy of Religion in Kansas City, November, 1991.
· Discussant, Session on "Religion and Liberation, Ideology and Freedom," Association for the Sociology of Religion, Cincinnati, August 1991.
· Invited Panel Member, "National Disasters: Loss and Mourning," American Academy of Religion, New Orleans, November 1990.
· "Weber's Mirror: the Protestant Ethic and Seventeenth Century Dutch Art," Association for the Sociology of Religion in Washington, DC, August 1990.
· "Saving the Creation: Authority Claims for Saving for the Earth," Association for the Sociology of Religion in Washington, DC, August 1990.