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
Sustainable development is applied to just about everything from energy to clean water and economic growth, and as a result it h
Sustainable development is applied to just about everything from energy to clean water and economic growth, and as a result it h
admin
2013-01-19
77
问题
Sustainable development is applied to just about everything from energy to clean water and economic growth, and as a result it has become difficult to question either the basic assumptions behind it or the way the concept is put to use. This is especially true in agriculture, where sustainable development is often taken as the sole measure of progress without a proper appreciation of historical and cultural perspectives.
To start with, it is important to remember that the nature of agriculture has changed markedly throughout history, and will continue to do so. Medieval agriculture in northern Europe fed, clothed and sheltered a predominantly rural society with a much lower population density than it is today. It had minimal effect on biodiversity, and any pollution it caused was typically localised. In terms of energy use and the nutrients(营养成 分) captured in the product it was relatively inefficient
Contrast this with farming since the start of the industrial revolutioa Competition from overseas led farmers to specialise and increase yields. Throughout this period food became cheaper, safer and more reliable. However, these changes have also led to habitat(栖息地) loss and to diminishing biodiversity.
What’s more demand for animal products in developing countries is growing so fast that meeting it will require an extra 300 million tons of grain a year by 2050. Yet the growth of cities and industry is reducing the amount of water available for agriculture in many regions.
All this means that agriculture in the 21 st century will have to be very different from how it was in the 20th. This will require radical thinking. For example, we need to move away from the idea that traditional practices are inevitably more sustainable than new ones. We also need to abandon the notion that agriculture can be "zero impact". The key will be to abandon the rather simple and static measures of sustainability, which centre on the need to maintain production without increasing damage.
Instead we need a more dynamic interpretation, one that looks at the pros and cons(正反两方面)of all the various ways land is used. There are many different ways to measure agricultural performance besides food yield: energy use, environmental (costs, water purity, carbon footprint and biodiversity. It is clear, for example, that the carbon cost of transposing tomatoes from Spain to the UK is less than that of producing them in the UK with additional heating and lighting. But we do not know whether lower carbon footprints will always be better for biodiversity.
What is crucial is recognising that sustainable agriculture is not just about sustainable food production.
Specialisation and the effort to increase yields have resulted in______.
选项
A、localised pollution
B、the shrinking of farmland
C、competition from overseas
D、the decrease of biodiversity
答案
D
解析
本题问“专业化耕作和产量提高导致了什么结果”。第三段第二、三、四句提到“Competitionfrom overseas led farmers to specialise and increase yields.Throughout this period food became cheaper,safer and more reliable.However,these changes have also led to habitat(栖息地)loss and to diminishing biodiversity.”即海外竞争致使农民进行专业化耕作,提高了产量,但这些变化是以动物栖息地范围的缩小和生物多样性的减少为代价的,故D“生物多样性的减少”正确。
转载请注明原文地址:https://kaotiyun.com/show/CP2O777K
0
考博英语
相关试题推荐
Manypeoplebelievetheglarefromsnowcausessnowblindness.Yet,darkglassesornottheyfindthemselvessufferingfromhead
Manypeoplebelievetheglarefromsnowcausessnowblindness.Yet,darkglassesornottheyfindthemselvessufferingfromhead
ThemostfamouspainterinVictoria’shistoryisEmilyCarr.Whenshewasachild,shediscoveredthatwalkinginthewoods【1】mo
Whenthenursetookhistemperature,itwasthreedegreesabove______.
Inits16years,theLondonMarathonhasacquiredapedigreeofexcellence.Thatexcellenceisnotjusttheawesomeenergyofth
Oncethe______oftheelectionhaddieddown,itwasbacktonormalforthePresident.
Thekitchenwassmalland______sothatthedisabledwomancouldreacheverythingwithoutdifficulty.
Thousandsofpeopleturnedoutintothestreetsto______againstthelocalauthorities’decisiontobuildahighwayacrossthe
Inthewakeof11September,Visionics,aleadingmanufacturer,issuedafactsheetexplaininghowitstechnologycouldenhance
随机试题
按照世界卫生组织规定的牙位记录方法,53代表的是
百日咳隔离期为
A.风B.寒C.燥D.暑E.火其性炎热而易致肿疡的邪气是
患者,女性,68岁。患慢性肺心病6年,今日咳嗽咳痰加重,发绀明显,给予半坐位的主要目的是
对施工用电、脚手架、龙门架、爆破、吊装、水下土方、支模、拆除等特殊工程,按规范标准达到要求的必须编制单项安全技术方案,并要有设计依据,可不附计算、详图及文字要求()
某拟建高速公路桥梁位于蓄洪区内,其()报告报请批准时,应当附具有关水行政主管部门审查批准的洪水影响评价报告。
“一俊遮百丑”“一坏百坏”等观点体现了()。
学生是人,是教育的对象,因而他们()①消极被动地接受教育②对外界的教育影响有选择性③毫无顾忌地接受教育④能动地接受教育
下列排序算法中,在每一趟都能选出一个元素放到其最终位置上,并且其时间性能受数据初始特性影响的是()。
A、Self-cateringaccommodationisveryfarfromtheuniversity.B、Ifastudentwantsaprivateaccommodation,hemaycalltheStu
最新回复
(
0
)