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

The pie chart illustrates the

three

primary factors that contributed to the degradation of

land

all over the world including over-grazing,

deforestation

and

over-cultivation

, and

other

Correct pronoun usage

others

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. The table gives information on how these categories affected

land

in North America,

Europe

, and Oceania in the 1990s.

Overall

, over-grazing

were

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was

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the greatest cause of worldwide less productive

land

. Among the

three

regions,

Europe

had the largest proportion of affected

land

by

three

causes

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

percentage

which is 35% of

causes

of less productive

land

.

However

, there seemed to be small differences between

this

figure

of

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for

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over-grazing and

deforestation

. It appeared that 30% of agricultural

land

were

Correct subject-verb agreement

was

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destroyed because of

deforestation

.

Moreover

,

over-cultivation

also

had

negative

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a negative

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effect on worldwide

land

, which had

percentage

Add an article

a percentage

the percentage

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of 28%.

On the other hand

, other factors accounted for 7% of

land

destruction. From the given table,

total

Correct article usage

the total

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degraded

land

by the

three

causes

during the 1990s in

Europe

was 23%.

This

percentage

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

Europe

, less productive

land

by

deforestation

represented 9.8%

while

over-cultivated

land

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

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three

Correct article usage

the three

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causes

in Oceania, which made up 11.3%.

However

, only 1.7% of Oceanian

land

was destroyed by

deforestation

.

Over-cultivation

seemed to have no effect on

this

region

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region's

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land

in the period.

However

, 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

, among

three

categories in North America

while

1.5% of

this

area's degraded

land

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

deforestation

. In total, the

percentage

of degraded

land

by over-grazing,

deforestation

, and

over-cultivation

in these

three

regions took up 41% that nearly halved the

world

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world's

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total

percentage

.