IELTS writing: a pie chart and a table Writing task: summarize the inormation by selecting and reporting the main features of the chart and the table, and make comparisons where relevant. The pie chart illustrates the main causes of worldwide land degradation while the table demonstrates how these factors affected Europe, North America and Oceania during the 1990s. According to the chart, over-grazing accounts for the largest proportion, with 35% of the land becoming less productive. Deforestation ranks at the second place, affecting 30% of worldwide agricultural land, and over-cultivation represents almost the same percentage. As is shown in the table, European agricultural land was the heavily affected in 1990s. Specifically, 9.8% was degraded by deforestation, with 7.7% by over-cultivation and 5.5% by over-grazing. By contrast, with much less land suffering from deforestation, 3.3% and 1.5% of Australian land became less productive due to over-cultivation and over-grazing respectively. In Oceania, over-grazing occupied 11.3%, which was much more than the other two regions. Overall, over-grazing is the principal reason for land degradation today. In addition, Europe suffered more from farmland degradation than the other two regions in 1990s.