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An expansive study traced the growth of 300,000 trees over three decades in Africa and the Amazon and compared how forests on the two continents were faring.The researchers estimate that intact tropical forests absorbed 46 billion tons of carbon dioxide from the atmosphere in the 1990s, but this figure plummeted to 25 billion tons in the 2010s...The study also found that forests in the Amazon are weakening as a carbon sink faster than those in Africa.
