雅思写作话题及范文: The pie chart below shows the main reasons why agric...

雅思写作话题及范文: The pie chart below shows the main reasons why agric...

范文

The pie chart shows that there are four main causes of farmland becoming degraded in the world today. Globally, 65% of degradation is caused by too much animal grazing and tree clearance, constituting 35% and 30% respectively. A further 28% of global degradation is due to over-cultivation of crops. Other causes account for only 7% collectively.

These causes affected different regions differently in the 1990s, with Europe having as much as 9.8% of degradation due to deforestation, while the impact of this on Oceania and North America was minimal, with only 1.7% and 0.2% of land affected respectively. Europe, with the highest overall percentage of land degraded (23%), also suffered from over-cultivation (7.7%) and over-grazing (5.5%). In contrast, Oceania had 13% of degraded farmland and this was mainly due to over-grazing (11.3%). North America had a lower proportion of degraded land at only 5%, and the main causes of this were over-cultivation (3.3%) and, to a lesser extent, over-grazing (1.5%).

Overall, it is clear that Europe suffered more from farmland degradation than the other regions, and the main causes there were deforestation and over-cultivation.

饼图显示，当今世界农田退化的主要原因有四个。全球65%的退化是由于过度放牧和树木砍伐造成的，分别占35%和30%。还有28%的全球退化是由于过度种植作物造成的。其他原因合计仅占7%。

20世纪90年代，这些原因对不同地区的影响有所不同，欧洲因森林砍伐造成的退化高达9.8%，而这对大洋洲和北美的影响微乎其微，分别只有1.7%和0.2%的土地受到影响。欧洲土地退化的总体比例最高（23%），也有过度耕种（7.7%）和过度放牧（5.5%）。相比之下，大洋洲有13%的退化农田，这主要是由于过度放牧（11.3%）。北美退化土地的比例较低，只有5%，其主要原因是过度耕作（3.3%），其次是过度放牧（1.5%）。

总的来说，很明显，欧洲比其他地区遭受的农田退化更严重，其主要原因是毁林和过度耕作。

>>免费领全球留学白皮书，了解各大学报考条件、费用、开学时间、含金量<<