首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
GLLOBAL WARMING-THE BEGINNING OF THE END Increased social debate regarding complex issues such as the greenhouse effect and
GLLOBAL WARMING-THE BEGINNING OF THE END Increased social debate regarding complex issues such as the greenhouse effect and
admin
2011-02-08
76
问题
GLLOBAL WARMING-THE BEGINNING OF THE END
Increased social debate regarding complex issues such as the greenhouse effect and global warming has definitely increased our environmental awareness. However, such debates are often emotive rather than informative. One can be forgiven, for example, for believing that the greenhouse effect is something we should be trying to eradicate!
Short-wave radiation, in the form of visible ultra-violet (UV) light from the Sun, penetrates Earth’s atmosphere to warm the surface of the planet. Because all matter is warmer than space, it radiates heat, and part of the sun’s energy is re-radiated out by the Earth’s surface. Greenhouse gases in the atmosphere trap some of this infrared radiation causing the Earth’s surface and lower atmospheric layers to warm up to a higher temperature than would otherwise be the case. Without these greenhouse gases, Earth would be a frozen, hostile environment with an average global temperature of about -15℃ to -19℃, where no life could be sustained. A thermal balance of energy exists where the Earth radiates about the same amount of energy into space as long-wave radiation that it absorbs from the sun. Our atmosphere allows the balance to be achieved because the trace gases trap and absorb heat.
Other interactions are at play that may affect the Earth’s albedo or balance of energy. The amount or type of cloud cover, for instance, can alter the amount of energy being exchanged. Cirrus clouds reflect more of the sun’s radiation than absorb radiation from the earth. Cumulus clouds do the opposite where the proportion of energy retained is larger than that reflected.
The detected increase in carbon dioxide in our atmosphere since the Industrial Revolution will also affect the albedo. Not only has there been an increase in carbon dioxide identified. Other greenhouse base gases such as methane, nitrous oxide and chlorofluorocarbons have all increased. It is thought that the latter of these minor greenhouse gases may have a stronger impact on global warming than carbon dioxide levels.
The largest contributing factor to the increase of greenhouse gases has been the burning of fossil fuels. Carbon in the fuel we burn is oxidised and released into the atmosphere as carbon dioxide. Compounding the problem, deforestation that has taken place over the last 50-100 years reduces the number of trees that are necessary for absorbing carbon dioxide from the atmosphere. Short-term solutions for regional economic survival means the importance of rainforests in this gas exchange has been ignored. Even a layman can see how the greenhouse effect has earned its bad reputation. An out-of- control greenhouse effect is often quoted using the example of Venus, where heat is trapped by thick clouds and a dense carbon dioxide atmospheric element, making the surface temperature as high as 500℃.
Scientists don’t always agree on their predictions. Whilst they agree that an increase in greenhouse gases will cause the Earth’s temperature to rise, they disagree on what may happen next. Some believe that the subsequent increase in water vapour may help to reduce the temperature. Others believe it will increase the temperature. The collection of meteorological data from observation satellites and a study of samples taken from glaciers and trees for example, support what many of planet Earth’s inhabitants notice for themselves. The globe is warming up. It is generally agreed that by about 2030/2040, the average global temperature (presently +15℃) will have risen by anything up to 5℃ causing polar ice-caps and mountain glaciers to melt and changes to ocean currents and circulation patterns causing coastal waters to rise. New weather patterns and extremes are anticipated.
Scientists do not know if the increase in average global temperature is just a cycle because of the absence of long-term meteorological data. Comparing climate epochs is complex because so many atmospheric and surface features of land and ocean are different. All of the elements that make up climate are continually changing and dynamically interacting. Knowing therefore, that the Earth cooled during past ice ages and warmed during interglacial periods, has limited worth in predictions for our future. Moreover, records of past climatic epochs are not as reliable or detailed as those records developed in recent decades.
General Circulation Models (GCMs) are designed to describe basic behaviour patterns of the atmosphere. Used on super-computers, the system still cannot represent all countries and has to rely on spatial representation of the earth. This means that specific consequences of climate change-like predicting the daily weather for specific climatic regions-are more difficult to predict than the global reality of the Greenhouse Effect.
The computers are much more accurate in showing these broader climatic conditions and predicting global effects than more localized phenomena.
Many experts conclude that failure to take action in order to limit the impact of human activity is taking a dangerous risk. Others argue that nature will save itself from our apparent inability or disinterest in protecting the planet and that adaptation will, once again, be the key to survival. As these debates continue and governments refuse to act, it is becoming more likely that we will be able to see for ourselves whether or not the dire predictions of global warming are overstated as early as the middle of this century.
Look at the following statements (Questions 36-40). Indicate:
TRUE if the statement agrees with information in the passage
FALSE if the statement contradicts information in the passage
NOT GIVEN if the information is not given in the passage.
Write your answers in boxes 36-40 on your Answer Sheet.
Over the next 30 years the average global temperature is expected to be at least 20℃. ______
选项
答案
假
解析
转载请注明原文地址:https://kaotiyun.com/show/gOVO777K
本试题收录于:
雅思阅读题库雅思(IELTS)分类
0
雅思阅读
雅思(IELTS)
相关试题推荐
Ifaisincreasedby25%andbisdecreasedby25%,theresultingnumberswillbeequal.Whatistheratioofatob?
SURVEYOFPETSINHOUSEHOLDSINANAPARTMENTCOMPLEXColumnAColumnBThe
When5consecutiveoddintegers,eachgreaterthan34areadded,whatisthesmallestpossiblesum?
Johnisbuildingacircularfencearoundhiscircularpool.Thepoolis26feetindiameter.IfJohnwantstohave2feetofspa
Thenumber0.001ishowmanytimesgreaterthanthenumber(0.0001)2?
PERCENTOFTHE300PEOPLEINGROUP1ANDTHE400PEOPLEINGROUP2WHOHAVESELECTEDAILMENTSThenumberofpe
PERCENTOFTHE300PEOPLEINGROUP1ANDTHE400PEOPLEINGROUP2WHOHAVESELECTEDAILMENTSThenumberofpe
Ifjandkareevenintegersandj
Theintegersxandyaregreaterthan1.If(4x)(7y)=756,whatisthevalueofx+y?x+y=______
Kathleensweeklysalarywasincreasedby8percentto$237.60.Whatwasherweeklysalarybeforetheincrease?
随机试题
Wherearethespeakersgoingtostay?
A.髌韧带B.半月板C.后交叉韧带D.翼状襞E.腓侧副韧带位于膝关节囊前壁的是()
奸党罪始创于()。
理论上“八项因素”构成的房租通常称为()。
顾客力量分析是企业特定经营环境分析的重要内容,不包括()。
在儿童早期,促使学生努力获得学习成就的是()。
西方宗教学的奠基人麦克斯.缨勒解释道:“宗教是一种内心的本能或气质,它独立地、不借助感觉和理性,能使人们领悟在不同名称和各种伪装下的无限。”把宗教解释为“独立地、不借助感觉和理性”而领悟“无限”的才能,真是高明之极。让宗教站在“无限”上,也就一劳永逸地摆脱
①风格的形成也意味着艺术的成熟,风格越强烈,给人的印象越深刻②但冰冻三尺非一日之寒,风格的形成不是一件容易的事,更不能刻意设计而得③颜柳欧赵,苏黄米蔡,风格鲜明,流传千古④它是个人漫长的艺术探索历程,有时甚至要付出一生的精力⑤书法有个性,能形成自己
民主革命时期,中国共产党对民族资产阶级采取又联合又斗争的政策,这是由于民族资产阶级具有
下列叙述中正确的是()。
最新回复
(
0
)