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
Despite decades of scientific research, no one yet knows how much damage human activity is doing to the environment. Humans are
Despite decades of scientific research, no one yet knows how much damage human activity is doing to the environment. Humans are
admin
2016-01-30
62
问题
Despite decades of scientific research, no one yet knows how much damage human activity is doing to the environment. Humans are thought to be responsible for a whole host of environmental problems, ranging from global warming to ozone depletion. What is not in doubt, however, is the devastating effect humans are having on the animal and plant life of the planet.
Currently, an estimated 50, 000 species become extinct every year. If this carries on, the impact on all living creatures is likely to be profound, says Dr. Nick Middleton, a geographer at Oxford University. " All species depend in some way on each other to survive. And the danger is that, if you remove one species from this very complex web of interrelationships, you have very little idea about the knock-on effects on the ecosystem. So, if you lose a key species, you might cause a whole cascade of other extinctions. "
Complicating matters is the fact that there are no obvious solutions to the problem. Unlike global warming and ozone depletion — which, if the political will was there, could be reduced by cutting gas emissions — preserving biodiversity remains an intractable problem.
The latest idea is " sustainable management" , which is seen as a practical and economical way of protecting species from extinction. This means humans should be able to use any species of animal or plant for their benefit, provided enough individuals of that species are left alive to ensure its continued existence.
For instance, instead of depending on largely ineffective laws against poaching, it gives local people a good economic reason to preserve plants and animals. In Zimbabwe, there is a sustainable management project to protect elephants. Foreign tourists pay large sums of money to kill these animals for sport. This money is then given to the inhabitants of the area where the hunting takes place. In theory, locals will be encouraged to protect elephants, instead of poaching them — or allowing others to poach them — because of the economic benefit involved.
This sounds like a sensible strategy, but it remains to be seen whether it will work. With corruption endemic in many developing countries, some observers are skeptical that the money will actually reach the people it is intended for. Others wonder how effective the locals will be at stopping poachers.
There are also questions about whether sustainable management is practical when it comes to protecting areas of great biodiversity such as the world’s tropical forests. In theory, the principle should be the same as with elephants — allow logging companies to cut down a certain number of trees, but not so many as to completely destroy the forest.
Sustainable management of forests requires controls on the number of trees which are cut down, as well as investment in replacing them. But because almost all tropical forests are located in countries which desperately need revenue from logging, there are few regulations to do this. Moreover, unrestricted logging is so much more profitable that wood prices from managed forests would cost up to five times more — an increase that consumers, no matter how "green" , are unlikely to pay.
For these reasons, sustainable management of tropical forests is unlikely to become widespread in the near future. This is disheartening news. It’s estimated these forests contain anything from 50 to 90 percent of all animal and plant species on Earth. In one study of a five-square-kilometer area of rain forest in Peru, for instance, scientists counted 1, 300 species of butterflies and 600 species of birds. In the entire continental United States, only 400 species of butterflies and 700 species of birds have been recorded.
Scientist professor Norman Myers sees this situation as a gigantic "experiment we’re conducting with our planet". "We don’t know what the outcome will be. If we make a mess of it, we can’t move to another planet ... It’s a case of one planet, one experiment. "
What factor(s)might affect the practicality of sustainable management?
选项
A、Whether there is corruption in the government.
B、Whether there are corresponding regulations.
C、Whether produced goods have attractive prices.
D、All of the above.
答案
D
解析
细节判断题。根据第六段第二句中可知,作者担心政府机构的corruption(腐败)会影响到可持续管理的实施,选项A正确;根据原文第八段首句中的requires controls可知选项B正确;根据原文第八段尾句中的…unrestricted logging is so much more profitable…are unlikely to pay,可知选项C正确。故答案为D。
转载请注明原文地址:https://www.kaotiyun.com/show/BIGO777K
0
考博英语
相关试题推荐
Realpolicemen,bothBritainandtheUnitedStates,hardlyrecognizeanyresemblancebetweentheirlivesandwhattheyseeonTV
Realpolicemen,bothBritainandtheUnitedStates,hardlyrecognizeanyresemblancebetweentheirlivesandwhattheyseeonTV
Businessandgovernmentleadersalsoconsidertheinflationratetobeanimportantgeneralindicator.Inflationisaperiodof
Businessandgovernmentleadersalsoconsidertheinflationratetobeanimportantgeneralindicator.Inflationisaperiodof
Duringthelastthirtyyears,theinternationaleconomyhasexperiencedabasicchange.ImprovementsintheInternetandotherc
Mycenaestrandsonahillskirtedbytwodeepravines.Thesiteisanaturalstrongpoint,dominatingtheplainorArgos.Itwas
InChristianwritersitisnaturalthatlogicalexplanationsofthegenerallawofstormsshouldcenterabouttheDevil.Clement
Whenadiseaseofepidemicproportionsripsintothepopulace,scientistsimmediatelygettowork,tryingtolocatethesourceo
The____questioninthiscaseiswhethertheaccusedhadamotiveforthiscrimeornot.
Opinionpollsarenowbeginningtoshowthat,whoeveristoblameandwhateverhappensfromnowno,highunemploymentisprobabl
随机试题
患者,男性,52岁,因严重胸痛8h,服药不能缓解,既往有心绞痛史2年。查体:面色苍白,血压110/90mmHg,脉搏77/分,心音正常;心电图示ST段抬高。此患者最可能的诊断是
女性,33岁。因“乏力、面色苍白,排浓茶色尿2周”入院,伴脱发、关节酸痛。查体:贫血貌,皮肤黄染,无皮疹和出血点,全身浅表淋巴结未触及,肝未及,睥肋下1cm。该患者最可能的诊断是
A.IHEB.RlSC.PASD.DICOME.LIS医疗机构信息集成规范的缩写是
依据《执业药师资格制度暂行规定》,执业药师继续教育实行
对于恩格尔定律的说法,正确的是()。(2011年多项选择第41题)
甲公司为从事机械设备加工生产与销售的一般纳税人,适用的增值税税率为17%,所得税税率为25%。2010年度至2011年度发生的有关固定资产业务如下:(1)2010年12月20日,甲公司向乙公司一次购进三台不同型号且具有不同生产能力的A设备、B设备和C设备
若所送的散客与住在其他两个饭店的散客同乘一辆车去机场,导游要严格按照约定的时间接运他们。()
对于绘制数据流图的主要原则的说法,不正确的是()。
Whatisthepurposeofthetalk?
Theleadersmettodiscusstheproblemsfacingtheir______countries.
最新回复
(
0
)