The pie chart below show 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 first chart displays the major causes of global

land

degradation

. The second graph, how three regions of the world were affected by forest clearance,

over-cultivation

, and over-grazing in the 1990s, is depicted.

Overall

, the root cause

for

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of

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worldwide

land

degradation

was allocated to over-grazing.

Moreover

, Europe had the highest share of farmland

degradation

than other regions.

According to

the first chart, the biggest reason for global

land

degradation

was devoted to over-grazing, which is 35

percent

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per cent

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.

Additionally

, nearly one-third and 28 % of the world's degraded

land

accounted for forest clearance and

over-cultivation

, respectively,

while

that of other

firm

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firms

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accounted for

land

degradation

, which is not clearly specified (7%). The second graph shows Europe had almost a quarter of its

land

degraded, and the main causes of

this

are

due to

deforestation (approximately one in ten

percent

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per cent

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) and

over-cultivation

(about 8%). Despite the fact that over-grazing played

the

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a

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crucial role in

land

degradation

in Oceania, accounting for 11.3%;

over-cultivation

did not have any impact on the

land

.

In addition

, 3.3% of

land

was destroyed

due to

over- grazing

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over-grazing

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in North America, meanwhile the figure for forest clearance stood at 0.2%.