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... plays a major role in the water cycle, recycling rain back into the clouds as it receives rainfall. As a result, when the land is cleared, flooding and drought become serious problems, as rainwater travels quickly through the ground without the forest to regulate it. The burning and felling of the forests is also exacerbating the Greenhouse Effect: approximately 10% of the heat-trapping carbon dioxide released into the atmosphere in 1987 was a result of the fires in the Amazon. It threatens the existence of indigenous peoples. There have been more extinctions of tribal peoples in this century than any other, with Brazil losing 87 tribes between 1900 and 1950. Deforestation robs the world of countless species, destroying crucial Biodiversity and losing species with potential uses in medicine, agriculture and industry. Biodiversity is important because it contributes to resiliency. A world without Biodiversity would be fragile and likely to amplify disturbance ...