Data regarding the causes of land degradation globally is depicted in the pie chart, while the region wise degradation in 1990s is illustrated in the table.
Overall, when overgrazing is seen as the major cause of this issue, the worst affected region in the given period was Europe.
As per the pie chart, it is clear that most areas of the agricultural land become less-productive due to over-grazing, and this accounts for just over a third of the total land. The second major factor is deforestation, and due to this approximately 30% of the farmland gets degraded. Over-cultivation is the next major cause when about 28% land is affected. Other causes collectively make 7% of the land less productive.
Turning to the regional share of degradation, the worst affected area was Europe. Of the 23% degraded land in Europe in 1990s, 9.8 % was due to deforestation, while over-cultivation caused 7.7% destruction. About 5.5% of its land got affected by over-grazing. The second worst affected area was Oceania, with around 13% degraded land. Of this, 11.3% was due to over-grazing. The least affected area was North America: 5%, and the major cause here was over-cultivation (3.3%).
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