Major environmental scientists, activists and thinkers interviewed in Leonardo Di Caprio's film The Eleventh Hour are profiled here - with videos of 'Time Capsule' messages they have recorded for future human generations.


On this page:

Herman Daly

Gloria Flora

Andy Lipkis

Peter Warshall


Herman Daly is an American ecological economist and professor at the School of Public Policy of University of Maryland, College Park in the United States. He was Senior Economist in the Environment Department of the World Bank, where he helped to develop policy guidelines related to sustainable development. Before joining the World Bank, he was Alumni Professor of Economics at Louisiana State University. He is a co-founder and associate editor of the journal, Ecological Economics. Dalyis a recipient of an Honorary Right Livelihood Award (the alternative Nobel Prize), the Heineken Prize for Environmental Science from the Royal Netherlands Academy of Arts and Sciences, the Sophie Prize (Norway) and the Leontief Prize from the Global Development and Environment Institute.

Gloria Flora worked for theU.S. Forest Service for 22 years and became nationally known both for her leadership in ecosystem management and for her courageous principled stands. When she was in charge of the Lewis and Clark National Forest in north-central Montana, she made a landmark decision to prohibit natural gas wells along the spectacular 356,000-acre Rocky Mountain Front. In 2000, she made national headlines when she resigned as Forest Supervisor for the largest national forest in the lower 48 states to call attention to antigovernment zealots engaged in the harassment and intimidation of Forest Service employees. For her courageous stewardship of public lands, she received the Murie Award from the Wilderness Society, the Environmental Quality Award for exemplary resource decision-making from the Natural Resources Council of America, and the Environmental Hero Award from Sunset Magazine. In 2004, she was selected as one of the nation's top environmentalists by Vanity Fair Magazine.

Andy Lipkis founded the nonprofit environmental organization TreePeople and has served as president since 1973. TreePeople staff have gone on to plant more than two million trees in the Los Angeles area and develop one of the nation’s largest environmental education programs. TreePeople works with government agencies on critical water issues facing Southern California. With thousands of members and volunteers and 45 staff, TreePeople is one of the largest environmental nonprofit organizations in California and a guiding light for the Citizen Forestry Movement. Lipkis’ programs include the planting of one million trees in L.A. before the 1984 Summer Olympics, numerous disaster relief efforts during flood and fire, and integrated urban ecosystem management to increase the health and sustainability ofcities.

Peter Warshall is an ecologist, activist and essayist whose work centers on conservation-based development. After receiving his primary degree from Harvard in 1964, he studied cultural anthropology in Paris with Claude Lévi-Strauss as a Fulbright Scholar. He returned to Harvard where he earned his Ph.D. in Biological Anthropology. Warshall's research interests include natural history, natural resource management, conservation biology, biodiversity assessment, environmental impact analysis, conflict resolution and consensus building between divergent economic and cultural groups. He has worked as a consultant for the U.N.High Commission for Refugees andUSAID. He was the Sustainability and Anthropology editor of the Whole Earth Catalog series and is a member of the Global Business Network.