The pie chart below represents the main reasons why agricultural land becomes less productive. The bar chart shows how these causes affected three regions of the world in the 1990s. Summarise the data by selecting and reporting the main features and make comparisons where relevant. Write at least 150 words.

The presented graphs illustrate the primary causes of

land

degradation

globally and provide statistics on the proportion of these causes in North America,

Europe

, and

Oceania

. The pie chart reveals that the factors contributing to

land

degradation

are threefold. The most significant cause is over-grazing, accounting for 35% of the total

degradation

.

This

is closely followed by deforestation at 30%

,

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and

over-cultivation

at 28%. Together, these three causes represent 93% of the total, with the remaining 7% attributed to other factors. The accompanying table shows the percentage of degraded

land

in three regions.

Europe

has the highest percentage of degraded

land

at 23%, followed by

Oceania

at 13%. In

Europe

, the high level of

land

degradation

is primarily

due to

deforestation (9.8%) and

over-cultivation

(7.7%). In

Oceania

, over-grazing is the dominant cause, with a strikingly high rate of 11.3%.

In contrast

, North America has a total

land

degradation

of 5%, which is mainly

due to

over-cultivation

(3.3%).

Overall

, it is evident that deforestation in

Europe

and over-grazing in

Oceania

are the principal reasons for

land

degradation

.

In contrast

, in North America, the primary issue is

over-cultivation

.