The pie chart below shows the main reasons why agricultural land becomes less productive. The table shows how these causes affected three regions of the world during the 1990s.

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The pie chart and table illustrate the major causes of global land degradation and compare their influences on North America, Europe and Oceania during the 1990s. It is noticeable that over-grazing was the leading cause of worldwide land degradation, while deforestation and over-cultivation constituted slightly smaller shares.

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The pie chart and table illustrate the major causes of global land degradation and compare their influences on North America, Europe and Oceania during the 1990s. It is noticeable that over-grazing was the biggest reason of worldwide land degradation, while deforestation and over-cultivation constituted moderately smaller shares.

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The two charts illustrate the major causes of global land degradation and compare their effects to North America, Europe and Oceania during the 1990s. It is noticeable that over-grazing took the biggest responsibility in worldwide land degradation, while the deforestation and over-cultivation constituted moderately smaller shares.

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The pie chart shows the main reasons why agricultural land becomes less productive, while the table shows how these causes affected three regions of the world during the 1990s. Overall, The main reasons for worldwide land degradation consisted of over-grazing, over-cultivation, deforestation and so on.