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

The pie chart compares the proportion of main causes which affected the productivity of lands in terms of agriculture,

while

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the table shows the information in North America, Europe, and Oceania in the 1990s.

Overall

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, over-grazing was the most important reason around the world,

while

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that for Europe as the first region, which suffered from

land

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degradation, was

deforestation

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.

According to

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the pie chart,

It is clear that

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the highest share of reasons for damaging

land

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fertile was over-grazing, accounting for 35%, followed by

deforestation

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, recorded at just under a third. The amount for over-cultivation was lower than

deforestation

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by 2%,

while

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that for other factors was only 7%. Regarding the details of the table, the total less productive

land

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was 23% in Europe, stood in

the

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apply

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first place,

moreover

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, the main reason was

deforestation

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.

However

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, over-grazing was the main destroying cause in Oceania and stood in second place for total

land

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degraded, by 10% lower.

Finally

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, North America was the least affected area at 5%.