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
Bangladeshi communities that are already being poisoned by arsenic-tainted(含砷)groundwater are facing an appalling new threat. Th
Bangladeshi communities that are already being poisoned by arsenic-tainted(含砷)groundwater are facing an appalling new threat. Th
admin
2013-02-16
21
问题
Bangladeshi communities that are already being poisoned by arsenic-tainted(含砷)groundwater are facing an appalling new threat. Their rice and vegetables are also laced with high levels of arsenic.
The health effects of eating such tainted food are not yet known, but the ramifications(门类)could be enormous. The WHO says contaminated drinking water alone could kill 270,080 Bangladeshis over the next decade.
In a terrible irony, arsenic entered the Bangladeshi water supply when UNICEF and other international agencies sank millions of tube veils to provide clean drinking water. But the wells tapped into groundwater contaminated by arsenic from sedimentary deposits deep below Bangladesh. To deal with the problem, UNICEF and the World Bank have been testing water from wells and marking them safe or dangerous—but that testing program has been found to be flawed.
To make matters worse, water from the wells is also used to irrigate paddy(水稻)fields. However, until now it wasn’t known whether or not the rice was accumulating-arsenic. Tests on rice samples from around Bangladesh had found that arsenic levels did indeed vary according to the strength of local arsenic contamination in the soil and groundwater.
Arsenic levels in different varieties of rice ranged from about 0.05 to 1.8 parts per million. In Europe and the US, levels are around 0.05 parts per million. The WHO recommends a maximum level of 0.01 parts per million in drinking water—but therefore, no guidelines for levels in foods.
Ravi Naidu at CSIRO in Adelaide and his colleagues have been studying the uptake of arsenic from the soil by Bangladeshi crops.
Their data shows that arum, a popular vegetable, has arsenic levels of nearly 150 parts per million. It is usually grown in wet zones adjacent to the tube wells. But some vegetables such as spinach and beans are relatively free from arsenic. The rice grains studied by Naidu’s team had arsenic levels that ranged from undetectable to over 1.6 parts per million. Their calculations show that nearly 30 per cent of the total arsenic intake for people in Bangladesh may be coming from their food.
If the body can absorb arsenic from food—and this is yet to be proven—then merely tackling drinking water contamination will not be enough. Researchers fear that paddy fields will continue to be irrigated from poisoned tube wells because Bangladesh does not have enough arsenic-free water for agriculture.
The central idea of the passage is about______.
选项
A、the contamination of water and crops in Bangladesh
B、how to cultivate rice free of arsenic
C、the serious consequences of arsenic intake
D、how to solve the water shortage problems in Bangladesh
答案
A
解析
根据文章内容可知,本文主要讨论的是孟加拉国的水污染和植物污染问题。其他各项均非文章中心。据此判断,答案是A。
转载请注明原文地址:https://kaotiyun.com/show/immO777K
0
考博英语
相关试题推荐
Gainingacknowledgementfromfellowworkersandmanagersgivesapersonasenseofimportanceinsociety.
Theessenceofbeliefistheestablishmentof______.Differentbeliefsaredistinguishablebythedifferentmodesofactionto
ThailandconfirmedthreenewhumanbirdflucasesThursdayashealthofficialswarneditcouldtaketwoyearstoconquerAsia’s
Forfarmershopingforahealthyharvest,thebestplacetoturnforhelpthesedaysistheMonsantoCorp.Oneoftheworld’sle
In1784,fiveyearsbeforehebecamepresidentoftheUnitedStates,GeorgeWashington,52,wasnearlytoothless.Sohehireda
Thepoliceinspector,havingreceivednewinformationfromaconfidentialsource,decidedtoenlargethe______ofhisenquiry.
Newandbizarrecrimeshavecomeintobeingwiththeadventofcomputertechnology.Organizedcrimehasbeendirectlyinvolved;
Inthepastoysterswereraisedinmuchthesamewayasdirtfannersraisedtomatoes—bytransplantingthem.First,farmersselec
TheMingDynastywasfoundedin1368bytheBuddhistmonkChuYuanchang,who,ridingonacrestofpeasantunrestandpopularpr
世界人口突破70亿,地球资源日益减少,人们忧心忡忡。中国宣称从1976年计划生育政策实施以来,中国已有效控制了出生率。如果没有计划生育,中国这个人口最多的国家就会多出几千万的人口。事实上,没有一个国家像中国这样大力度地、大规模地执行这项政策。据第
随机试题
女性,41岁。查体上腹部可听到连续的嗡鸣声。该患者可能是
拍卖人应当于拍卖日()前发布拍卖公告。
下列关于城市规划管理方面的基本术语,哪一项是错误的?()
施工质量事故,按工程状态分为( )。
一个完整的会计软件系统必定包括()功能模块,其他功能模块直接或间接与它进行联系。
关于企业政策性搬迁损失的所得税处理,下列说法正确的是()。
甲公司是增值税一般纳税人,2016年11月经营业务如下:(1)购进油漆、零配件一批,取得增值税专用发票,注明增值税额为8.5万元;进口红木原木一批,取得海关进口增值税专用缴款书,注明增值税额为26万元;向林业生产者收购桦木一批,开具农产品收购凭证,注明
公民和法人都享有的人格权有()。
如果一个函数带有参数说明,则参数的默认值应该在()中给出。
Labelthediagram.WriteNOMORETHANTHREEWORDSforeachanswer.ASUPERMARKETAISLE
最新回复
(
0
)