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.

The pie

chart

Use synonyms

illustrates some principal causes that contribute to the degradation of the

land

Use synonyms

and the table demonstrates the negative effects on the three continents during the 1990s. All units were shown in percentage.

Overall

Linking Words

, the majority of

land

Use synonyms

in the pie

chart

Use synonyms

was degraded by over-grazing and

deforestation

Use synonyms

. In the table, the highest proportion of

land

Use synonyms

being destroyed was in Europe and the opposite was true for North America. Looking at the pie

chart

Use synonyms

, the main reason for the degradation of the

land

Use synonyms

was over-grazing, which was the biggest number in the

chart

Use synonyms

, 35%.

Besides

Linking Words

that, a third of less productive agricultural

land

Use synonyms

was the consequence of

deforestation

Use synonyms

, which was higher than over-cultivation, 29%. The final figure was other factors, the lowest part in the

chart

Use synonyms

, 7% of all. Concerning the table, Europe had the highest proportion of

land

Use synonyms

degraded, 23% which contained the majority of

deforestation

Use synonyms

, 9%, 7.7% of over-cultivation and 5.5% in over-grazing fields. Looking at Oceania, it had the majority of effects caused by over-grazing, 13%, and just owned 1.7% of

deforestation

Use synonyms

. The region had the lowest of

land

Use synonyms

degraded, 5%, North America was affected primarily by over-cultivation, accounting for 3.3%,

besides

Linking Words

that it had 0.2%

deforestation

Use synonyms

and 1.5 of over-grazing too.