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
2013-01-20
71
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 revolution. 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 21st 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.
What will agriculture be like in the 21st century?
选项
A、It will go through radical changes.
B、It will supply mort animal products.
C、It will abandon traditional farming practices.
D、It will cause zero damage to the environment.
答案
A
解析
本题问“21世纪农业可能全是怎样的”。第二段第一句提到“To start with,it is important to remember that the nature of agriculture has changed markedly throughout history,and will continue to do so.”即农业的本质在历史上历经了巨大的变迁,并将不断变更下去,故A“它会经历根本性的变化”正确。
转载请注明原文地址:https://kaotiyun.com/show/n02O777K
0
考博英语
相关试题推荐
Bythefirstdecadeofthe21stcentury,internationalcommercialairtrafficisexpected______vastlybeyondtoday’slevels.
Thedirectoroftheresearchinstitutecameinpersonto______thateverythingwasallright.
Thereareseveralpossibleexplanationsforthegreaterjob______inJapanincontrasttothegreatjobmobilityintheUnited
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsurvivalintheopen.Theyhadneitherthepowerfult
Therearethreeseparatesourcesofhazard【1】totheuseofnuclearreactiontosupplyuswithenergy.Firstly,theradioactivem
AnIndiananthropologist.ChandraThapar,madeastudyofforeigncultures,whichhadcustomssimilarto【1】ofhisnativeland.O
______consideredthehumanbodyaestheticallysatisfactory.
Tousitseemssonaturaltoputupanumbrellatokeepthewateroffwhenitrains.Butactuallytheumbrellawasnotinvented
Despitethefactthattheywere________whentheymarried,after30yearstheylivetogetherharmoniously.
随机试题
从行业生命周期各阶段的特点来看,行业的产品逐渐完善,规模不断扩大,市场迅速扩张,行业内企业的销售额和利润迅速增长,则该行业属于()。
下列关于肝肾综合症的叙述正确的是()
患者,腹大按之不坚,胁下胀满或疼痛,小便短少,纳食减少,食后作胀,嗳气不爽,苔白腻,脉弦。方选
肉桂具有的功效是()
会计机构负责人必须具备的条件之一是()。
影响接力跑成绩的关键技术环节是传、接棒技术。()
商品生产中,有一系列经济规律,而其中最基本的规律是()。
《牛津条例》
下列各句横线处,依次填入成语,最恰当的是()。太阳太崇高尊严了,它只能垂顾保育隶属于大自然的万物,无暇顾及人为的事物。于是在朦胧中显得古色古香的点缀,在日光中只觉得______;在月光下显得神秘艳异的装饰,在日光下只觉得______;在灯光下显得娇艳欲
当电源关闭后,下列火于存储器的说法中,正确的是()。
最新回复
(
0
)