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

The

given

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pie chart provides information about the

percentage

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of four factors that

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causes

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cause

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less

productive

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productivity

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of agricultural

land

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,

while

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the given table illustrates the

proportion

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of

three

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factors that affected

three

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regions of the world during the 1990s.

Overall

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, over-grazing

have

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has

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the biggest

proportion

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about

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of

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the

causes

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of agricultural

land

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becomes

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becoming

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less productive

while

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the other is the lowest.

In addition

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, Europe had the highest

percentage

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of

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three

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the three

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causes

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of

land

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degradation

while

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North America had the lowest

percentage

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except for

over-cultivation

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.

To begin

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with, over-grazing is the main factor on why agricultural

land

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becomes less productive. It takes 35% of all reasons.

Next,

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28% of that phenomenon is caused by

over-cultivation

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.

Deforestation

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takes 30% of the

causes

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on

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of

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less productive

of

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apply

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agricultural

land

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. 7% of other factors

also

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contribute

on

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to

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less productive agricultural

land

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. In Europe,

deforestation

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,

over-cultivation

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, and over-grazing

ware

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were

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always

took

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apply

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the highest

proportion

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of the

causes

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of

land

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degradation compared to the other two countries. The

percentage

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were 9.8%, 7.7%, and 5.5% for

deforestation

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,

over-cultivation

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, and over-grazing respectively with

total

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the total

a total

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number was 23%. Oceania

also

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had the same problem

with

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as

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Europe except for

over-cultivation

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.

Deforestation

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and over-grazing took 1.7% and 11.3% respectively on that phenomenon

while

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over-cultivation

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took 0%. The total number of that destruction was 13%.

Lastly

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, in North America, the

three

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reasons

on

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for

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that phenomenon took the lowest

proportion

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except for the

over-cultivation

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. The

percentage

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was 0.2% for

deforestation

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, 3.3% for

over-cultivation

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, and 1.5% for over-grazing with

total

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the total

a total

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number was 5%.