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

The chart illustrates the leading causes of worldwide

land

degradation

,

while

the table gives data on its causes in 3 regions, namely North America, Europe and Oceania in the 1990s.

Overall

,

while

the main reason causing

land

to be less productive is over-grazing and the minor reasons are others, the

region

affected by

land

degradation

the most was Europe and the least was North America. The second leader among problems which lead to

land

degradation

is

deforestation

being equal to 30%. Meanwhile, over-cultivation is represented by 28%, other reasons cause less productivity just by 7%.

However

, Europe was the

region

affected the most which is observed not only by its

overall

score which was 23%, but

also

by the causes harming

land

the most:

deforestation

and over-cultivation constituted 9.8% and 7.7% respectively. In comparison,

although

over-grazing caused the most damage in Oceania, where it made up 11.3%, over-cultivation did not play any role in soil

degradation

there.

In addition

, North America was the

region

, which faced

this

problem in a minor way with

deforestation

being 0.2%, which justifies that

deforestation

was the least important problem in that

region

and

also

the minimum in comparison with other territories.