More than 60% of the Amazon rainforest is in Brazil, and the new study used satellite monitoring to measure carbon storage from 2010-2019.
The study found that degradation (parts of the forest is damaged but not destroyed) accounted for three times more carbon loss than deforestation.
Degradation is linked to deforestation, especially in weakened portions of a forest near deforested zones, but it is also caused by tree-felling and forest fires.
Climate events, such as droughts, further increase tree mortality.
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