About a third of the remaining Amazon rainforest has been severely degraded by human activity, and the emissions from this activity are equivalent to or even greater than emissions caused by deforestation, according to a new study
, is the result of an analysis of existing data, including satellite imagery showing the changes of the Amazon, and catalogues the changes in the Amazon region between 2001 and 2018.
Researchers define degradation as transient or long-term changes in an area of the forest caused by humans. This may include situations where an area loses many or even all of its trees, but the land is not repurposed for another use outside of being part of the forest. They found that between 2001 and 2018, the total area of the Amazon rainforest that was under degradation was greater than the amount lost to deforestation in that time period.In this new study, researchers found that carbon emissions from areas of the Amazon degraded by human activity during the study period totalled 0.2 petagrams of carbon per year. A petagram is a billion metric tons, or a unit of mass equal to a quadrillion grams, and 0.2 petagrams is roughly two hundred billion kilograms.
As the study only looks at data up to 2018, it doesn’t address whether the degradation has gotten worse as deforestation has. In 2022, deforestation in the Amazon rainforest hit a record high for the first six months,, with experts connecting the increase to former Brazil president Jair Bolsonaro, who stripped environmental regulations and protections during his time in office between 2019 and 2022.
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