The Science, Economics and Politics of Global Warming
Guest: Robert T. Harris.
Today on Focus, we'll discuss the theory of global warming with Robert T. Harris, Chief Scientist and Director for Environmentally and Socially Sustainable Development at the World Bank.
The Snowball Earth Hypothesis: Testing the Limits of Global Change
Guest: Paul Hoffman.
Some scientists believe that at one time in the past, Earth became so cold it completely froze over. This period of extreme cold was followed by a dramatic swing to warmth, which may have had a profound impact on the development of complex life on our planet. Other scientists disagree, questioning the Earth's ability to thaw and the survival of any life of its surface. Today on Focus, host David Inge talks to Paul Hoffman, professor of geology at Harvard University and one of the leaders of the "Snowball Earth" hypothesis.
The Climate of Man
With Elizabeth Kolbert, journalist and staff writer at The New Yorker who wrote a three-part series titles "The Climate of Man," which examined the science and politics of climate change.