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This team is building the world's biggest library of trees
A group of organizations is joining forces to build a database of tree samples that will help officials crack down on illegal logging.
7:28
• Source:
CNN
Call to Earth
16 videos

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This team is building the world's biggest library of trees
Puget Sound seal pups on the road to recovery

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The Dutch mastered the sea but its reefs paid the price, so this company is printing new ones
Inside the National Geographic Museum of Exploration

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Why scientists want ice from 600 meters below the surface
Call to Earth: Reviving India's waters

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Bearded vulture on the brink: Conservationists in South Africa and Lesotho race to save this raptor











