The pie chart shows the main reason why agricultural land becomes less productive.

The pie chart illustrates the

three

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primary factors that contributed to the degradation of

land

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all over the world including over-grazing,

deforestation

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and

over-cultivation

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, and

other

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others

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. The table gives information on how these categories affected

land

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in North America,

Europe

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, and Oceania in the 1990s.

Overall

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, over-grazing

were

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was

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the greatest cause of worldwide less productive

land

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. Among the

three

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regions,

Europe

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had the largest proportion of affected

land

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by

three

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causes

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. The opposite was true for North America. The pie chart shows that over-grazing accounted for the highest

percentage

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which is 35% of

causes

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of less productive

land

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.

However

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, there seemed to be small differences between

this

Linking Words

figure

of

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for

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over-grazing and

deforestation

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. It appeared that 30% of agricultural

land

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were

Correct subject-verb agreement

was

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destroyed because of

deforestation

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.

Moreover

Linking Words

,

over-cultivation

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also

Linking Words

had

negative

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a negative

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effect on worldwide

land

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, which had

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percentage

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a percentage

the percentage

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of 28%.

On the other hand

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, other factors accounted for 7% of

land

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destruction. From the given table,

total

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the total

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degraded

land

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by the

three

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causes

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during the 1990s in

Europe

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was 23%.

This

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percentage

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nearly doubled Oceanian (13%) and was more than four times as much as North American (5%). In

Europe

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, less productive

land

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by

deforestation

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represented 9.8%

while

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over-cultivated

land

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and over-grazed one accounted for 7.7% and 5.5%. Meanwhile, over-grazing took up the greatest proportion

among

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of

show examples

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three

Correct article usage

the three

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causes

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in Oceania, which made up 11.3%.

However

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, only 1.7% of Oceanian

land

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was destroyed by

deforestation

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.

Over-cultivation

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seemed to have no effect on

this

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region

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region's

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land

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in the period.

However

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, it was the main cause, which accounted for 3.3% of

region

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regions

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whose less productive

land

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, among

three

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categories in North America

while

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1.5% of

this

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area's degraded

land

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was caused by over-gazing and 0.2% was affected by

deforestation

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. In total, the

percentage

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of degraded

land

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by over-grazing,

deforestation

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, and

over-cultivation

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in these

three

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regions took up 41% that nearly halved the

world

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world's

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total

percentage

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.