According to a 2001 paper (Land degradation: an overview), it is estimated that the total annual cost of erosion from agriculture in the USA is about $44 billion per year, i.e. about $100 per acre of cropland and pasture. On a global scale, the annual loss of 75 billion tons of soil costs the world about $400 billion per year, or approximately $70 per person per year (Eswaran, H., et. al. 2001). Read more in this article from the Capital Journal (Pierre, SD).
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