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Text: "The Antarctic is the vast source of cold on our planet, just as the sun is the source of our heat, and it exerts tremendous control on our climate," Cousteau told the camera. "The cold ocean water around Antartica flows north to mix with warmer water from the tropic, and its upwellings help to cool both the surface water and our atmosphere. Yet the fragility of this regulating system is now threatened by human activity." From "Captain Cousteau," Audubon (May 1990):17. Each paragraph will be a test.

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