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
To best protect threatened plants, inefficient national parks should be sold off and the proceeds used to buy more cost-effectiv
To best protect threatened plants, inefficient national parks should be sold off and the proceeds used to buy more cost-effectiv
admin
2014-05-30
67
问题
To best protect threatened plants, inefficient national parks should be sold off and the proceeds used to buy more cost-effective ones. So says Richard Fuller at the University of Queensland in St. Lucia, Australia, who reckons that replacing 1 per cent of Australia’s protected areas could significantly increase the number of vegetation types being protected.
Worldwide, there are 100,000 regions dedicated to bio-diversity maintenance, covering 12 per cent of countries’ land and territorial waters. "Historically, a lot of these areas were designated because we couldn’t use them for economic or agriculture purposes, not for their bio-diversity value," says Fuller. "Consequently, many species and habitats remain inadequately protected." For example, up to 83 per cent of threatened plants are found outside protected areas.
Fuller says environmentalists who try only to increase the number of protected sites are effectively "adding to an inefficient system". Instead, he says, governments should sell off expensive land of low conservation value and buy new sites instead.
Fuller’s team has developed a mathematical model to test their theory in Australia. The group divided the country’s landmass(国土)into around 65,000 sections before assigning each a "conservation value" based on the rarity of the vegetation type within it: higher values were given to areas where more native vegetation has been lost. They then divided each section’s conservation value by its financial value, enabling them to rank currently protected areas in terms of cost-effectiveness. In the model, the least cost-effective areas were sold off and the funds used to buy more cost-effective sites.
For a vegetation type to be considered as "protected" in the team’s model, 15 per cent of the land area it covered must lie in protected areas. Currently, only 18 out of 60 Australian vegetation types are protected by this measure. Replacing just 1 per cent of the least cost-effective areas boosted the number to 54. "We get an enormous increase in efficiency without spending more money," says Fuller.
"It’s a logical approach with obvious benefits for protected bio-diversity," says Jon Nevill, an environmental consultant in Hampton, Victoria, Australia. "But I have no confidence that governments could effectively manage such a difficult programme." Martin Taylor, a protected areas policy manager at environmental campaign group WWF-Australia, is less complimentary. He says the idea of "trading off protected areas to buy theoretically better ones" is "quite horrifying". Sacrificing a protected area based solely on vegetation types without consideration of native animals or local geography is troublesome, he says. "No area can be written off so lightly as these authors do."
Fuller defends his approach, saying the study is just a demonstration. "If this idea was to be put into practice you would need to consider these other values."
What could be achieved by replacing just 1 per cent of the least cost-effective areas in Australia?
选项
A、The number of protected sites would increase to 54.
B、The protected vegetation types would increase to 54.
C、The land area covered by protected sites would increase by 54%.
D、The cost-effectiveness of protected areas would increase by 54%.
答案
B
解析
根据题干中的replacing just 1 per cent of the least cost-effective areas可以快速定位到第5段第3句。解题关键在于弄清the number指的是什么的数量。答案在上一句找。该段第2句说到,澳大利亚60种植被中只有18种得到了保护,因此可以判断这里的the number指的是受保护植物的数目。因此排除A,选B。
转载请注明原文地址:https://kaotiyun.com/show/p017777K
0
大学英语六级
相关试题推荐
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrolsbehavior.Ittellsplantswhento【C1】______flowers
The35percentofAfrican-Americanyouthlivinginpovertyarethemostvisiblevictimsofwhatisoftencalledtheachievement
Isyourfamilyinterestedinbuyingadog?Adogcanbeahappy【B1】______toyourfamily,butifyouchoosethewrongkindofdog
Well-to-doparentsareincreasinglyoptingtosendtheirchildrentosingle-sexprepschools,reversingthetrendofrecentyear
Whentheheartbreaksdown,itbeatsirregularlyornotatall.Abonecanchiporsnap.Butwhenthecomplexnetworkofneurons
Whentheheartbreaksdown,itbeatsirregularlyornotatall.Abonecanchiporsnap.Butwhenthecomplexnetworkofneurons
Alcoholhasapeculiarrelationshiptohappiness.Wedrinktocelebrate,butbecausealcoholworksasadepressant,itendsupd
Withgraduateunemploymentatitshighestformorethanadecade,thelureoftheparentalnesthasneverbeenstronger.Butspo
Whatmakesusthewayweare?Whyaresomepeoplepredisposedtobeanxiousoroverweight?Howisitthatsomeofusarepronet
Americansusuallyconsiderthemselvesafriendlypeople.Theirfriendships,however,tendtobeshorterandmore【B1】______thanf
随机试题
畸胎瘤是来源于
薄层色谱法测定黄曲霉毒素B1时,试验中所接触过AFB1的玻璃容器、实验材料和废弃物均应在5%次氯酸钠溶液中浸泡30min以上,以破坏其毒性。
下列()不是完全竞争市场的条件。
进行项目建设必须要有项目资本金,项目资本金的筹集包括( )。
()是用于启闭燃气管道通路或调节管道介质流量的设备。
一家商业银行对所有客户的贷款政策均一视同仁,对信用等级低以及高的均适用同样的贷款利率,为改进业务,此银行应采取()的风险管理措施。
甲公司经常派业务员乙与丙公司订立合同。乙调离后,又持盖有甲公司公章的合同书与尚不知其已调离的丙公司订立一份合同。并按照通常做法提走货款,后逃匿。对此甲公司并不知情。丙公司要求甲公司履行合同,甲公司认为该合同与己无关,予以拒绝。下列选项哪一个是正确的?(
新闻失实已成为新闻界不得不面对的一种尴尬。如果说铲除其根源当下还无法实现,那么,新闻更正便成为修正差错的最有效手段。在新闻失实造成损害时,媒体主动纠正差错,予以更正或道歉,不仅仅是媒体免责或减轻诉讼的最重要手段,更重要的是它对于构建媒介公信力有着不可低估的
设一台微机的CPU有20根地址线,其寻址能力可达【】。
IntheUnitedStates,itisnotcustomarytotelephonesomeoneveryearlyinthemorning.Ifyoutelephonehimearlyintheday,
最新回复
(
0
)