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 given pie chart and table present the four main factors contributing to the decrease in agricultural land productivity and how their effects on specific regions such as North America, Europe, Oceania in the 1990s.

Overall, the pie chart indicates that over-grazing is the principal cause of degradation of the land. Meanwhile, the table indicates that Europe was the region most affected by land degradation.

It is clear from the pie chart that over-grazing was the main cause of land degradation with 35%, followed closely by deforestation and over-cultivation with 30% and 28%, respectively. The remaining 7% belongs to other reasons not specified.

In the second chart, Europe headed the table in terms of land degradation due to deforestation, at 9.8%, whereas the other two regions recorded the percentage of less than 2%. Besides, 7.7% of the land in Europe was degraded due to over-cultivation compared with 3.3% in North America and zero in Oceania. Over-grazing was responsible for 11.3% of land degraded in Oceania, which was double the proportion seen in Europe. It is interesting to note that North America had the lowest total land degraded with only 5%.