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Why are international groups concerned about deforestation in the Amazon basin?

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Edge of a dense forest in Romania where clear cutting has removed most trees, leaving a bare, brown slope beside standing green trees. — Deforestation A section of clear-cut forest in Romania.

International groups are deeply concerned about deforestation in the Amazon basin because the region functions as a vital global resource with significant ecological and biological importance. Their concerns are primarily driven by the following factors:1

Climate Regulation: The Amazon acts as a massive carbon reservoir. When forests are cleared or burned, stored carbon is released as carbon dioxide, a greenhouse gas that accelerates global warming.231
Biodiversity Loss: The Amazon Rainforest is a biodiversity hot spot harboring a vast portion of Earth’s species. Deforestation threatens this unique gene pool and the potential discovery of new pharmaceuticals.31
Hydrological Impact: The forest plays a critical role in the hydrologic cycle through evapotranspiration, which recycles rainfall across the region. Its destruction could lead to severe droughts and altered weather patterns.31
Indigenous Welfare: The survival of Indigenous peoples, who rely on and possess deep knowledge of the rainforest’s resources, is directly threatened by the loss of their habitat.1