雅思寫作話題及范文: The pie chart below shows the main reasons why agric...

雅思寫作話題及范文: 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.

餅圖顯示，當(dāng)今世界農(nóng)田退化的主要原因有四個。全球65%的退化是由于過度放牧和樹木砍伐造成的，分別占35%和30%。還有28%的全球退化是由于過度種植作物造成的。其他原因合計僅占7%。

20世紀(jì)90年代，這些原因?qū)Σ煌貐^(qū)的影響有所不同，歐洲因森林砍伐造成的退化高達(dá)9.8%，而這對大洋洲和北美的影響微乎其微，分別只有1.7%和0.2%的土地受到影響。歐洲土地退化的總體比例最高（23%），也有過度耕種（7.7%）和過度放牧（5.5%）。相比之下，大洋洲有13%的退化農(nóng)田，這主要是由于過度放牧（11.3%）。北美退化土地的比例較低，只有5%，其主要原因是過度耕作（3.3%），其次是過度放牧（1.5%）。

總的來說，很明顯，歐洲比其他地區(qū)遭受的農(nóng)田退化更嚴(yán)重，其主要原因是毀林和過度耕作。

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