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
2023-08-25
45
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 has resulted in the degradation of the ecosystem for the past 50 years?
选项
A、The sustainable development of agriculture.
B、The human’s destruction to the environment.
C、The human’s demand for biological diversity.
D、The increasing demand in food production.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2957619.html
相关试题推荐
Thepast50yearshaveseenmassiveexpansionofagriculture,withfoodprod
Thepast50yearshaveseenmassiveexpansionofagriculture,withfoodprod
CampusCrimeWeoftenthinkofagricultureaspl
CampusCrimeWeoftenthinkofagricultureaspl
CampusCrimeWeoftenthinkofagricultureaspl
CampusCrimeWeoftenthinkofagricultureaspl
CampusCrimeWeoftenthinkofagricultureaspl
CampusCrimeWeoftenthinkofagricultureaspl
Massivechangesinalloftheworld’sdeeplycherishedsportinghabitsareu
Massivechangesinalloftheworld’sdeeplycherishedsportinghabitsareu
随机试题
______isthispieceofequipmenttoberemovedfromthebuilding.A、Onnoaccount
[audioFiles]audio_eusm_j14_001(20082)[/audioFiles]A、Hehashurthishand.B、He
实用计算中,取同步发电机的负序电抗为()。
下列关于地震震级和地震烈度的叙述错误的是( )。A.一次地震的震级通常用基本烈
有抗冻要求的混凝土工程,宜选用()水泥。A.普通硅酸盐 B.矿渣硅酸盐
下列关于信用风险的说法,错误的是()。A.对大多数商业银行来说,贷款是最主要的
《国家电网公司变电检测管理规定》规定,协助制定公司变电设备检测相关制度、标准是国
某栋多功能组合建筑,地下4层,地上20层,每层高度为3.05m,该建筑采用框架剪
()是指在对引进技术消化吸收的基础上进行创新,开发出技术上更先进的产品。A.委
在招股说明书中,发行人应披露不少于最近3年的简要利润表、不少于最近3年末的简要资
最新回复
(
0
)