Daniel Schrag is professor of Earth and planetary sciences and environmental engineering at Harvard University and the director of the Harvard University Center for the Environment. Read bio
Chris Field is the founding director of the Carnegie Institution's Department of Global Ecology, professor of biological sciences at Stanford University, and faculty director of Stanford's Jasper Ridge Biological Preserve.
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Lonnie Thompson, a distinguished professor of geologic sciences at The Ohio State University and senior research scientist with the Byrd Polar Research Center, has become one of the world's authorities on the melting of glaciers and ice caps as a warning of rising global temperatures. Read bio // Read interview transcript