臭氧层空洞面积及原因
折线📝 题目
The line graphs show the size of the ozone hole in Antarctic and three types of damaging gases that damage the Antarctic ozone from 1980 to 2000. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
✍️ 参考范文
The two graphs provide information that was gathered in incremental periods between 1980 and 2000. The first chart shows the size of the Antarctic Ozone hole while the second displays the amount of three kinds of harmful gases being emitted into the atmosphere.
Overall, the Ozone hole expanded significantly from 1980 to 2000. Similarly, the majority of damaging gases also saw notable growth, except Freon which decreased dramatically.
In 1980, the Ozone hole was around 40,000 square kilometres in size. This figure spiked dramatically between 1985 and 1990, growing to nearly 200,000 square kilometers, which was approximately five times larger than its size in 1980. In contrast, its size increased only slightly from 1990 to 2000, growing by approximately 40,000 square kilometres.
Concerning the production of damaging gases, the volume of Freon plunged from a high of around 200,000 metric tonnes in 1985 to a low of roughly 20,000 in 2000. Conversely, after remaining steady between 1980 and 1990, NO2 and H2O2 jumped sharply over the next decade. In 1990, roughly 100,000 metric tonnes of NO2 and 18,000 metric tonnes of H2O2 were produced. These had risen to nearly 155,000 metric tonnes and 80,000 metric tonnes respectively, by 2000.