How would planting 8 billion trees every year for 20 years affect Earth's climate?
- Written by Karen D. Holl, Professor of Restoration Ecology, University of California, Santa Cruz
Planting 8 billion trees a year would replace about half of the 15 billion cut down annually.Michael Tewelde/AFP via Getty Images
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If we planted 8 billion trees a year for 20 years, what would...
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