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

The chart illustrates the leading causes of worldwide

land

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degradation

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,

while

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the table gives data on its causes in 3 regions, namely North America, Europe and Oceania in the 1990s.

Overall

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,

while

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the main reason causing

land

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to be less productive is over-grazing and the minor reasons are others, the

region

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affected by

land

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degradation

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the most was Europe and the least was North America. The second leader among problems which lead to

land

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degradation

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is

deforestation

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being equal to 30%. Meanwhile, over-cultivation is represented by 28%, other reasons cause less productivity just by 7%.

However

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, Europe was the

region

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affected the most which is observed not only by its

overall

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score which was 23%, but

also

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by the causes harming

land

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the most:

deforestation

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and over-cultivation constituted 9.8% and 7.7% respectively. In comparison,

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over-grazing caused the most damage in Oceania, where it made up 11.3%, over-cultivation did not play any role in soil

degradation

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there.

In addition

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, North America was the

region

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, which faced

this

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problem in a minor way with

deforestation

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being 0.2%, which justifies that

deforestation

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was the least important problem in that

region

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and

also

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the minimum in comparison with other territories.