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The image shows a pie chart and table indicating the causes of worldwide land degradation and its effects on three regions of the world during the 1990s. The pie chart reveals over-cultivation (28%), over-grazing (35%), and deforestation (30%) as the main reasons, with 'other' causes accounting for 7%. The table presents the percentage of land degraded by each cause in North America, Europe, and Oceania, with North America having 0.2% due to deforestation, 0.8% due to over-cultivation, 3.3% due to over-grazing totaling 5.5% of land degraded. Europe faces 9.8% from deforestation, 7.7% from over-cultivation, 5.5% from over-grazing, totaling 23%. Oceania has the highest percentage, with 11.3% due to deforestation, 7.5% due to over-cultivation, and 13% due to over-grazing, totaling 31.8% of land degraded.
Given the complexity of the image, the above description may not be entirely accurate.
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The given pie chart illustrates the main reasons for worldwide agricultural land degradation, while the table provides data on how these factors affected three regions – North America, Europe, and Oceania – during the 1990s.
Overall, over-grazing was the leading cause of global land degradation, followed closely by deforestation and over-cultivation. Among the regions, Europe experienced the highest proportion of degraded land, whereas North America had the least.
Looking at the global picture, over-grazing accounted for 35% of all degraded land, slightly more than deforestation (30%) and over-cultivation (28%). Only a small fraction, 7%, was attributed to other reasons.
Turning to the regional data, Europe had the most severe degradation at 23%, mainly due to deforestation (9.8%) and over-cultivation (7.7%). Oceania ranked second with 13%, where over-grazing was by far the dominant factor (11.3%). In contrast, North America showed minimal land degradation at just 5%, and most of it resulted from over-cultivation rather than deforestation or grazing.
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