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Amazon Rainforest under risk of desertification

Despite comprising a higher biodiversity why, is the Amazon Rainforest under risk of desertification?

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The natural soil of the Amazon Rainforest is not moreover fertile but it is improved by the vegetal covering which is made of leaves and branches which fall from the trees. Deforestation diminishes this enrichment. In the deforestation zones, the rain falls directly on ground causing erosion, ‘washing’ large areas (or leaching) and contributing to make soil even less fertile. Besides that, the deforestation prohibited the recycling of vital nutrients for plants, like nitrogen. In this way, those area and their neighboring areas undergo desertification.

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