Could global warming, which is gradually heating the planet, could bring Earth to another such "tipping point"? To find the answer, geologists are poring over evidence of past climate shifts by drilling for ice cores in Greenland's ice cap for evidence of past climate shifts and climate modelers are using computers to discover whether today's breadbaskets could become tomorrow's deserts.
Producers: Daniel Grossman and John Rudolph
Editors: Loretta Williams and Deborah George
Host: Ira Flatow
Coordinating Producer: Sasha Aslanian
Project Coordinator: Misha Quill
Production Assistance: Ellen Guettler, Samantha Kennedy, and Neil Tassoni
Mixing: Craig Thorson and D.B. Cooper
Executive Editor: Stephen Smith
Executive Producer: Bill Buzenberg
American RadioWorks is the national documentary unit of American Public Media.
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For more on global warming, check out The Modern Scholar: Global Warming, Global Threat.
©2004 American Public Media
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