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Life Changing Inventions of the 20th Century!
CO2 in the Ice Core Record
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CO2 in the Ice Core Record

This frozen library, the National Ice Core Lab in Denver, Colorado, has ice from all over… kept at minus 35 degrees. The oldest core here goes back some 400,000 years. Here really ancient ice from Greenland in the north, and

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A Zero-Waste Activist and Bear Biologist on How You Can Save the Planet