A coupled atmosphere-biosphere model was used to assess the effects of Amazon deforestation on regional and global climate. Replacing tropical forests with degraded pasture in the model led to increased surface temperatures, reduced evapotranspiration and precipitation, and a longer dry season, making forest recovery difficult. The study shows that vegetation influences regional climate, and deforestation could disrupt the dynamic equilibrium between climate and vegetation. At the current deforestation rate, most Amazonian forests could disappear in 50-100 years. Deforestation would also impact species diversity and atmospheric chemistry, as the Amazon hosts half the world's species and is a major ozone sink. The study used a high-resolution model to simulate the effects of replacing forests with pasture, showing a significant reduction in precipitation and evapotranspiration, with a longer dry season. The results suggest that Amazon deforestation could lead to irreversible changes, affecting the region's hydrological cycle and complex plant-animal interactions. The study highlights the importance of understanding the Amazon's role in global climate and the potential consequences of its destruction.A coupled atmosphere-biosphere model was used to assess the effects of Amazon deforestation on regional and global climate. Replacing tropical forests with degraded pasture in the model led to increased surface temperatures, reduced evapotranspiration and precipitation, and a longer dry season, making forest recovery difficult. The study shows that vegetation influences regional climate, and deforestation could disrupt the dynamic equilibrium between climate and vegetation. At the current deforestation rate, most Amazonian forests could disappear in 50-100 years. Deforestation would also impact species diversity and atmospheric chemistry, as the Amazon hosts half the world's species and is a major ozone sink. The study used a high-resolution model to simulate the effects of replacing forests with pasture, showing a significant reduction in precipitation and evapotranspiration, with a longer dry season. The results suggest that Amazon deforestation could lead to irreversible changes, affecting the region's hydrological cycle and complex plant-animal interactions. The study highlights the importance of understanding the Amazon's role in global climate and the potential consequences of its destruction.