The pie chart shows the main reasons why agricultural land becomes less productive. The table shows how these causes affected three regions of the world during 1990s. Summaries the information by selecting and reporting the main features, and make comparisons where relevant.

The pie chart illustrates the global

degradation

of agricultural

land

worldwide which was driven by three main

factors

. The table shows the three affected

regions

by the causes in the 1990s. When considered together, there is no correlation between the two sets of data. Globally, there are four main causes of unproductive

land

, including overgrazing at 35%,

deforestation

at 30%,

over-cultivation

at 28%, and other

factors

at 7%.

However

, these four

factors

do not directly affect the

land

in the three

regions

. First,

land

degradation

was caused by different

factors

in some

regions

. In Europe,

deforestation

was the leading factor responsible for the total

land

degraded at 23% with 9.8%

deforestation

, followed by

over-cultivation

at 7.7%, and over-grazing had a small contribution at 5.5%. In Oceania, over-grazing was the most significant cause of

land

degradation

, affecting by11.3%,

while

deforestation

had a minor impact at 1.7%.

Over-cultivation

did not contribute to

land

degradation

in

this

region, resulting in a total

degradation

of 13%. North America had less unproductive

land

with a total of 5%.

Over-cultivation

had the largest impact at 3.3%,

while

over-grazing caused 1.5%, and

deforestation

was less significant at 0.2% of

degradation

.

Overall

, over-grazing and

deforestation

were the leading causes of

land

degradation

globally, but have varied significantly across different

regions

.