The provided pie chart depicts the percentage of causes of worldwide land degradation in four different categories: overcultivation, overgrazing, deforestation, and other. While the table shows the proportion of causes of land degradation by region in three countries: North America, Europe, and Oceania. The information is given for the year 1990.
Overall, it is clearly seen that the maximum ratio of worldwide land degradation was by overgrazing in 1990. While, according to the table, the highest percentage of total land degradation by region occurred in Europe during the same period.
Looking at the pie chart in detail, in 1990, the ratio of causes of worldwide land degradation for overgrazing was at the top position, at 35%. However, it was followed by deforestation, which contributed 30%. Whereas, it is noticeable that the next place was occupied by overcultivation, with 28%. In contrast, other was at the bottom position, at only 7%.
Analyzing the table further, in 1990, the proportion of causes of land degradation from North America on deforestation was 0.2% compared to 3.3% on overcultivation. However, for the former category, the ratio of land degradation was 9.8% and 1.7% from Europe and Oceania, respectively. Whereas, for the latter category, the percentage of land degradation by region was 7.7% and 0% in the same nations, respectively. On the one hand, the proportion of land degradation by overgrazing was 11.3%, 5.5%, and 1.5% in Oceania, Europe, and North America, respectively. On the other hand, the percentage of total land degraded was 23%, 13%, and 5% in Europe, Oceania, and North America, respectively.