TPO27,综合+独立写作,听力材料,范文.pdf
1 TPO27 Integrated Writing jiangxjames Lecture Unfortunately the arguments of the reading passage are a little out of date Scientists now have new ination that shows that none of the ideas the reading passage discusses could account for the Little IceAge First about the Gulf Stream Scientists now know that disrupting the Gulf Stream would cause cooling only in Europe and North America but the Little Ice Age also affected the Southern hemisphere in places like New Zealand and South Africa for example Since the disruption of the Gulf Stream cannot explain why these southern areas became colder it cannot explain the Little IceAge Second the volcanoes theory It s true that if volcanic eruptions put enough dust into the atmosphere the result can be a cooler climate But large amounts of volcanic dust in the atmosphere would have also produced striking visual effect that people would have noticed at the time For example dramatically colorful sunsets or snow being grey or brown instead of white But there are almost no reports of anything like that routinely happening during the Little Ice Age So it seems that the volcanic eruptions during that period were simply not strong enough to release the large amounts of dust needed to lower global temperatures Third about forests on farmland stopping the warming greenhouse effect by removing carbon dioxide There just was not enough time for this effect to work The human population grew back to previous levels fairly quickly which meant that forests were soon being cut down again to clear fields for the crops needed to feed the growing population As a result we know that the forests mentioned in the reading passage were not there long enough to cau...
|
== 试读已结束，如需继续阅读敬请充值会员 ==
|
|
本站文章均为原创投稿，仅供下载参考，付费用户可查看完整且有格式内容！
(费用标准：38元/2月，98元/2年，微信支付秒开通！) |
| 升级为会员即可查阅全文 。如需要查阅全文，请 免费注册 或 登录会员 |
|
