首页
登录
职称英语
The past 50 years have seen massive expansion of agriculture, with food prod
The past 50 years have seen massive expansion of agriculture, with food prod
游客
2024-04-27
4
管理
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 OECD(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. [br] What should be done to change the food production systems?
选项
A、Addressing the problem of overpopulation.
B、Calling for the efforts of international community.
C、Restricting food prices and promoting the use of bio-energy.
D、Establishing an environmentally-friendly system.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3573887.html
相关试题推荐
Thepast50yearshaveseenmassiveexpansionofagriculture,withfoodprod
Thepast50yearshaveseenmassiveexpansionofagriculture,withfoodprod
Thepast50yearshaveseenmassiveexpansionofagriculture,withfoodprod
Thepast50yearshaveseenmassiveexpansionofagriculture,withfoodprod
CampusCrimeWeoftenthinkofagricultureaspl
CampusCrimeWeoftenthinkofagricultureaspl
CampusCrimeWeoftenthinkofagricultureaspl
Massivechangesinalloftheworld’sdeeplycherishedsportinghabitsareu
Massivechangesinalloftheworld’sdeeplycherishedsportinghabitsareu
Massivechangesinalloftheworld’sdeeplycherishedsportinghabitsareu
随机试题
PASSAGEONEWhydidthegirlplaybasketballoverandoveragain?Developingmode
【S1】[br]【S3】C下文的robotsthatworkinfactories.提示应当选择industrial。
[originaltext]FormerChelseafirstteamdoctorEvaCarneirorejecteda1.2mpou
A.不连续 B.连续但左、右导数不存在 C.连续但不可导 D.可导
数据库测试的对象包括______。 ①数据库连接测试②数据库的
下列各项中,不属于火邪的致病特点的是A.火热为阳邪,其性燔灼趋上 B.火热易伤
鞣质与下列物质中不能产生沉淀的是A.生物碱B.金属盐C.蛋白质D.石灰水E.铁氰
实验设计不包括()。A.实验组和控制组 B.自变量和因变量 C.前测和后
2005-82.小儿食指络脉色鲜红者,多属 A.实证B.虚证C寒证D.
根据《安全生产法》和《建筑法》,施作业人员应当享有的安全生产权利有()。A.获得
最新回复
(
0
)