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

The pie chart compares the percentage of different

reasons

for the

degradation

of agricultural

land

, and the table illustrates the percentage of

degradation

in North America, Europe, and Oceania in 1990.

Overall

, it is apparent that the majority of lands became less productive

due to

the over-grazing.

Besides

, Europe experienced the highest amount of

land

degraded, with 23% in total.

To begin

with, the pie chart shows three main

reasons

for

land

degradation

.

Firstly

, over-grazing was responsible for the

degradation

of more than a third of agricultural

land

.

Moreover

, deforestation accounted for 30%, which ranked second among other

reasons

.

Finally

, over-cultivation comprised 28% of

degradation

.

Although

there were other

reasons

for

degradation

, they were a mere 7% , which was fairly low. Shifting to the table, it can be seen that North America had particularly low levels of

degradation

, with a modest 5% in 1990.

In Contrast

, the total

land

degraded in Europe was 23%, which was the biggest amount of

degradation

among other countries.

Additionally

, the proportion of degraded

land

in Oceania was 13% , and to be more specific, 11.3% out of

this

13% was caused by over-grazing.