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
2015-01-09
85
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 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 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 e-ndemic 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-bio-diversity 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 butterfly and 600 species of bird. In the entire continental United States, only 400 species of butterfly and 700 species of bird 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 is an effective way to preserve biodiversity?
选项
A、Reduction of the impact of species extinction on others.
B、Sustainable management of the world’s tropical forests.
C、Encouragement of political will to reduce gas emission.
D、None of the above. No effective way has been found yet.
答案
C
解析
题目问:有效保护生物多样性的方法是什么?第三段“Unlike global warming and ozone depletion—which,if the political will was there,could be reduced by cutting gas emissions.”通过这句话可知,不像全球变暖和臭氧耗竭,如果有政治因素参与,那么气体排放量将会降低。据此判断,答案是C。
转载请注明原文地址:https://kaotiyun.com/show/XZQO777K
0
考博英语
相关试题推荐
WhowontheWorldCup1994footballgame?WhathappenedattheUnitedNations?Howdidthecriticslikethenewplay?【C1】______e
Onleavingschoolhebecameanoffice-boyandhavingno______torisehigher,heonlywastedhistime.
PeopleplanningtotravelbycartoNorthDakotainthewinterareadvisedto______theircarswithsnowtiresandwarmclothing
TheUnitedNationsdeclaredlastFridaythatSomalia’sfamineisover.Buttheofficialdeclarationmeanslittletothemillions
TheUnitedNationsPopulationFundhaspickedOctober31asthedaytheworldwillbehometo7billionpeople.Forbettera
ThereisonelastquestionImustdealwithinthischapter.Whyshouldhumanbeingsbemoral?Anotherwayofputtingtheproble
Bigcitiestodayareconfrontedwithveryseriousproblems.Transportisa【1】difficulty:someplannersbelievein【2】transportsy
Itisnotoftenrealizedthatwomen【1】ahighplaceinsouthernEuropeansocietiesinthe10thand11thcenturies.Asa【2】,thew
TheOlympicGames______in776B.C.inOlympia,asmalltowninGreece.
NepalisacountryincentralAsiathatislandlockedand______bytheHimalayas.
随机试题
我国《票据法》规定,在票据上变造_________、_________、_________则变造行为无效,且票据也无效。
一家中国电动车公司委托某快递公司将该公司的样品运到美国芝加哥的某镇。快递公司承接样品运输业务后,先委托某航空公司将样品运到纽约,然后由火车将样品运到芝加哥,最后通过汽车运输样品时由于卸载不当将样品损坏。在该案中,向中国电动车公司承担赔偿责任的主体为
Asurveyhascomeupwithsomeinteresting【B1】______aboutthecostoflivinginourmajorcities.Tokyoisstillthe【B2】____
蒲黄的功效是()
慢性骨髓炎最有意义的诊断依据是
通常用于分期导流的前期阶段,特别是一期导流的导流方式是()。
根据((INCOTERMS2000》,卖方不需要负责办理出口许可证的贸易术语是()
进出口商品的净价是指不包括明佣和暗佣的实际价格。( )
股票A的报酬率的预期值为10%,标准差为25%,贝他系数为1.25,股票B的报酬率的预期值为12%,标准差为15%,贝他系数为1.5,则有关股票A和股票B风险的说法A的有()。
(2017·山东)刚买车,就有保险公司发来短信;刚买房,就有装修公司来联络。在我们生活中,信息泄露事件时有发生,这要求政府()
最新回复
(
0
)