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
The past 50 years have seen massive expansion of agriculture, with food production more than doubling in order to meet demand. B
The past 50 years have seen massive expansion of agriculture, with food production more than doubling in order to meet demand. B
admin
2012-04-09
19
问题
The past 50 years have seen massive expansion of agriculture, with food production more than doubling in order to meet demand. But it has left us with 60% of all ecosystem services degraded, accelerated species extinction, and huge loss in genetic diversity. Currently, four plant species—wheat, maize, rice and potato— provide more than half of the plant-based calories in the human diet, while about a dozen animal species provide 90% of animal protein consumed globally.
As the agricultural frontier has expanded, those farmers previously dependant on a more diverse source of livelihood have converted to cash crops. As traditional varieties and breeds die out, so too do the traditional knowledge and practices of local farmers. The focus on agricultural commodities rather than on food production to meet the basic needs of people has undermined diversity and self-reliance, and left farmers vulnerable to volatile markets, political instability and environmental change.
Increased food production in some parts of the world has been at the expense of natural and semi-natural ecosystems that provide us greater long-term security. In Britain, studies have shown that hay production is higher in meadows with a greater number of species. In Australia, crop yields are higher in regions where native biodiversity has been preserved. In the seas, too, areas with a higher number of conserved species generate more fish for humans to catch and eat. There are many other examples from land and sea to show that a healthy environment means more food and a greater capacity to survive natural disasters. The current food crisis, meanwhile, will only be exacerbated by climate change, with southern Africa and South Asia expected to be particularly badly affected.
So what are the solutions to feeding a growing world population in the face of climate change? We have been hearing about a Green Revolution for Africa, major irrigation and fertilization programs, genetically modified seed varieties, as well as banning the use of crops for bio-fuel production. Amazingly, there is very little attention being paid to what fundamentally underpins (支持) all of our food systems—biodiversity and the services provided by ecosystems, such as soil, water and resilience to disasters. We have to change the economic rules of current food production systems. We must eliminate agricultural and fisheries subsidies that support elites in the North, and get rid of protectionist measures in OEGD (Organization for Economic Cooperation and Development) countries for agricultural products. We have to allow for value-added trade for the benefit of the South, and expand fair trade and labeling processes that create incentives and add benefits to producers in the South. We must change food production systems, moving from the existing model based on high inputs accessible through markets, to systems based on locally available and more environmentally-friendly inputs.
The massive expansion of agriculture drives the current farmers to focus on______.
选项
A、building up modern knowledge and technology
B、developing modern business-dominated agricultural industry
C、depending on a more diverse source of livelihood
D、making the efforts to improve the natural environment
答案
B
解析
细节推断题。本段开头表明,随着农业的发展,以前靠多种渠道维持生计的农民现在转而种起了经济作物。接着第三句指出专注于农业商品的生产而不管粮食生产满足人们的基本需求的做法反而使农民深受其害。由此可见,农业的飞速发展驱使农民由传统农业转向以经济为主的农业生产,因此B)为正确答案。
转载请注明原文地址:https://jikaoti.com/ti/QOvFFFFM
0
大学英语六级
相关试题推荐
A、Callherafterfive.B、Makecallsfromherphone.C、Gotothemeetingwithher.D、Fixhisphone.B语义替换题。男士说自己的电话坏了,但他又有很多电话需要在
A、Becausetheywanttoearnhighsalary.B、Becauseschoolsdonotteachstudentshowtochoosejobs.C、Becausetherehasbeense
A、Theyfoundwaystospeedupthereproductionofbaldeagles.B、Theydevelopednewtypesoffeedforbabybaldeagles.C、Theye
Languageisthemeansbywhichthethoughtsandfeelingsofonepersonarecarriedtoanotherpersonsothattheyareunderstood
Don’tworry,behappyand,accordingtoanewresearch,youwillalsobehealthy.Itisestimatedthatoverthe【B1】______o
A、Listenattentively.B、Paymoreattentiontorefutingspeakers.C、Focusonthedetails.D、Beabsent-minded.B语义理解题。文章最后说到人们在听别
WhenToyotaMotorCorp.movedoneofitsdivisionsintoanenvironmentallyfriendly,or"green",buildinginTorrancethreeyear
A、Hecompletedacalltothatnumberonlyashorttimeago.B、Hebelievestheoperatorcannothearhim.C、Hebelievestheoperat
ThemaincontentofAmericancultureistheemphasisonindividuals’value,thepursuitofdemocracyandfreedom,thepromotion
A、Herfatheriscrueltoher.B、Herfatherisateacher.C、Sheisinthethirdyearincollege.D、Shewillhuntjobsnextweek.
随机试题
拉伸试验所受的载荷是()。
测定焊缝外形尺寸的检验方法是()。
某电视台拍摄一档真人秀节目,有A、B、C、D、E五位表演嘉宾,要求安排他们入住红、黄、蓝三顶帐篷。五位表演嘉宾提出了以下几点入住要求:①嘉宾A要入住红色帐篷②B和C要入住同一顶帐篷③如果D入住蓝色帐篷,则E也要入住蓝色帐篷
房地产经纪人知识结构的核心是()。
根据《人民币银行结算账户管理办法》的规定,下列各项中,可以申请开立专用存款账户的是( )。
转移途中的服务是导游员给游客留下良好第一印象的重要环节,所谓转移是指()。
竞技体育形成的基本动因不包括下列哪项?()
大兴安岭在我国地理分界上的作用是()。①既是中温带和暖温带,又是高原和平原之间的分界线;②既是季风区和非季风区,又是耕作区与畜牧区之间的分界线;③既是地势第一、二阶梯,又是内、外流域之间的分界线;④既是森林和草原,又是半湿润区和半干旱区之
建立表Employee的视图Era_view,正确的SQL命令是()。
Manypeoplewhoareadoptingachildexpectittobringgreatjoytotheirlife.Butwhen【C1】______parentswanttheirchildbac
最新回复
(
0
)