The pie chart shows the main reasons why agricultural land becomes less productive. The table shows how these causes affected three regions of the world during 1990s. Summaries the information by selecting and reporting the main features, and make comparisons where relevant.

The pie chart illustrates the global

degradation

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of agricultural

land

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worldwide which was driven by three main

factors

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. The table shows the three affected

regions

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by the causes in the 1990s. When considered together, there is no correlation between the two sets of data. Globally, there are four main causes of unproductive

land

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, including overgrazing at 35%,

deforestation

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at 30%,

over-cultivation

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at 28%, and other

factors

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at 7%.

However

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, these four

factors

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do not directly affect the

land

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in the three

regions

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. First,

land

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degradation

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was caused by different

factors

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in some

regions

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. In Europe,

deforestation

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was the leading factor responsible for the total

land

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degraded at 23% with 9.8%

deforestation

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, followed by

over-cultivation

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at 7.7%, and over-grazing had a small contribution at 5.5%. In Oceania, over-grazing was the most significant cause of

land

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degradation

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, affecting by11.3%,

while

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deforestation

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had a minor impact at 1.7%.

Over-cultivation

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did not contribute to

land

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degradation

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in

this

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region, resulting in a total

degradation

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of 13%. North America had less unproductive

land

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with a total of 5%.

Over-cultivation

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had the largest impact at 3.3%,

while

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over-grazing caused 1.5%, and

deforestation

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was less significant at 0.2% of

degradation

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.

Overall

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, over-grazing and

deforestation

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were the leading causes of

land

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degradation

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globally, but have varied significantly across different

regions

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.