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Richard Alley has taken an extreme leap -- off a really high bridge -- to demonstrate how drastically the Earth's climate is shifting.
In two installments of the PBS series "Earth: The Operators' Manual," Alley, the film's host and a Penn State University geoscientist, bungee jumps from a platform in Queenstown, New Zealand, while visiting communities around the world that are finding new ways to harness renewable energy resources and reduce their carbon footprint.
From wind farmers in Texas to clean coal plants in China, the series explores the science of climate change and how sustainable practices can save the planet and the pocketbook.
Alley recently spoke with Hari Sreenivasan about his project. Watch the interview and excerpts above.
