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

The pie chart depicts the 4 undermining factors why cultivated

land

becomes unproductive,

while

the table illustrates how

such

factors contributed to

land

degradation

in 3 distinct regions during the 1990s. To commence, over-grazing was the predominant factor that caused agricultural

land

to become less productive, accounting for 35% of the total.

This

was followed by deforestation and over-cultivation with almost identical percentages at 29% on each issue.

In contrast

, the other problem was approximately 28% less compared to over-grazing, indicating a remarkable disparity.

On the other hand

, by the 1990s, regarding causes of

land

degradation

by region, deforestation had destroyed 9.8% of

land

in

Europe

,

while

in Oceania and North

America

, the percentages were relatively low, at 1.7% and 0.2% respectively.

Moreover

, though 7.7% of

land

in

Europe

and 3.3% of

land

in North

America

had become less productive

due to

over-cultivation, Oceania's

land

was unaffected by over-cultivation.

Additionally

, 11.3% of Oceania’s

land

was destroyed by over-grazing,

while

this

issue only destroyed less than half of Oceania’s in North

America

and

Europe

.

Consequently

,

Europe

was the region with the highest percentage of total

land

degradation

(23%), followed by Oceania at 13% and North

America

at 5%. To encapsulate, though over-grazing was the dominant underlying issue that caused worldwide

land

degradation

,

Europe

was the most degraded among other regions.