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

The pie chart and table illustrate some information about the causes of

land

Use synonyms

degradation and its effects on three different regions of the world in the 1990s.

Overall

Linking Words

, over-grazing was the biggest reason for worldwide

land

Use synonyms

infertility.

However

Linking Words

, the opposite was true for

Oceania

Use synonyms

. To be more specific, the major reasons why worldwide

land

Use synonyms

became less productive were over-grazing and deforestation at 35% and 30% respectively. Followed by over-cultivation at 28%. The other cause was responsible for damage

of

Change preposition

to

show examples

7% of the

land

Use synonyms

.

While

Linking Words

looking at the table, 0.2 and 0% of deforestation and over-cultivation were two minor causes of

land

Use synonyms

degradation in North America and

Oceania

Use synonyms

respectively.

Whereas

Linking Words

, in

Oceania

Use synonyms

and Europe, over-grazing and deforestation were the biggest reasons for

land

Use synonyms

infertility. The % of total

land

Use synonyms

that becomes less productive for all reasons was at 5%,23% and 13% for North America, Europe and

Oceania

Use synonyms

respectively. In the North American region, over-grazing is the mild cause at 1.5 for less fertility of agricultural

land

Use synonyms

.