Band 7+: 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 table shows the reasons for land degradation by country in North America, Europe, and Oceania during the 1990s, and the pie chart indicates why farmland became less productive.

Looking at the first pie chart, overgrazing is 35% and deforestation is 30%; these are the most common causes of land degradation. Overcultivation and other causes are 28% and 7%, respectively.

The table gives more detailed information about the land degradation that affected these three regions. Surprisingly, 23% of the total land degraded is in Europe, in which deforestation and overcultivation are highest compared to the other two regions. It is mostly 9.8%, and overgrazing and other degradation are also increasing, at 7.7% and 5.5%, respectively. In Oceania, deforestation and overcultivation are 1.7%, and there is no grazing, but other degradation is 11.3%, which is highest compared to the other regions. That is why the total land degraded is 13%. The total land degraded in North America is only 5%; it is used for less degraded agricultural land.

Overall, all of these causes of land degradation have affected world land degradation, causing it to become less productive.