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
You might think a little global warming is good for farming. Longer, warmer growing seasons and more carbon dioxide(CO2)—what pl
You might think a little global warming is good for farming. Longer, warmer growing seasons and more carbon dioxide(CO2)—what pl
admin
2013-10-30
28
问题
You might think a little global warming is good for farming. Longer, warmer growing seasons and more carbon dioxide(CO
2
)—what plant wouldn’t love that? The agricultural industry basically agrees on that. But global warming’s effects on agriculture would actually be quite complicated—and mostly not for the better.
It’s true that some crops will prosper on a warmer planet, but the key word there is "some." According to a government report, higher CO
2
levels and longer growing seasons will increase yields for fruit growers in the Great Lakes region. But many major American crops already use CO
2
so efficiently that more of it probably won’t make much difference to them.
What will make a difference are all the other things we’ll have more of as temperatures rise—namely droughts(干旱), bugs and big storms. More droughts mean lower crop yields. Melting snow in the Western U.S. will increase water availability in spring but decrease it in summer, forcing farmers to change cropping practices. As insects that eat crops adapt their migration patterns to our warmer climate, farmers will have to either use more insecticide or plant hardier crops.
Farmers on both coasts are already starting to reap some of what the nation’s fossil-fuel addiction has sown. Crops in those regions require a certain number of colder days, or "winter chill" before they break dormancy(冬眠)and begin flowering. Too few cold days breaks the plants’ flowering schedule which in turn affects pollination(授粉)and hurts yield.
So, given how much is at stake for them, how are farm states working to shape climate legislation? In response to agricultural demands, the Waxman-Markey bill frees the agricultural industry from CO
2
emission limits and gives up control over what activities guarantee carbon offset credit to the Agricultural Department.
Some farmers—and some farm state congressional leaders—have argued that because plants convert CO
2
into oxygen, agricultural lands store more CO
2
than they emit. This is only theoretically true. What we can say with certainty is that, like most big industries, farming is fossil-fuel intensive—large quantities of CO
2
are emitted from farm equipment such as irrigation pumps and tractors.
What is the result of "the nation’s fossil-fuel addiction" on both coasts?
选项
A、Plants yield decreases due to shortened winter chill.
B、Plants yield without dormancy and flowering.
C、Crops require longer winter chill than before.
D、The yields are no longer influenced by the climate.
答案
A
解析
本题询问美国热衷于使用化石燃料而造成的后果。该段首句即提到东西两岸的农民已尝到了其带来的恶果。对化石燃料的过度使用造成全球变暖,缩短了那些地方农作物应有的winter chill,影响农作物的授粉和产量,A与第4段文意相符,故为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/PLS7777K
0
大学英语四级
相关试题推荐
A、Seasonalvariationsinnature.B、Howwecanimproveourintelligence.C、Howintelligencechangeswiththechangeofseasons.D
FreeCollegeCoursesFeedGlobalHungerforLearningIn2002,whentheMassachusettsInstituteofTechnology(MIT)startedto
A、Therelationshipofpurchasesmadetotimespentshopping.B、Thelengthoftimerequiredfordrugstoreshopping.C、Theincreas
A、Themannolongersmokes.B、Themanisunderpressurefromhiswife.C、Themanusuallyfollowshiswife’sadvice.D、Themanre
Whatissaidaboutglobalwarminginthefirstparagraph?Greenhouseemissionswillmorethandoubleby2050becauseof______.
A、Lookingforatimetable.B、Buyingsomefurniture.C、Reservingatable.D、Windowshopping.C此对话中我们听到了和餐馆相关的内容:Haveyouatable
A、Exactly$20.B、Lessthan$2.C、About$3.D、About$30.C细节计算题。按饭店消费额的15%来计算(inrestaurantsyougenerallyleaveabout15per
A、Topayfortransportation.B、Tomakeaphonecall.C、Todoshopping.D、Togivethemtothewoman.A题目询问男士要用硬币做什么。关键是听到他说“我要用来付
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthefamily.Membersofafamilylivetogetherunderthe
随机试题
为了确保方案顺利实施,企业应从哪些方面推动咨询方案的实施?
口腔黏膜上皮粒层明显,角质层有脱落,并见角质栓塞,应考虑
硫酸链霉素与硫酸庆大霉素共有的鉴别试验有
建设工程项目信息按项目实施的工作过程分类,可分为()。
根据《银行卡业务管理办法》的有关规定,透支期限最长为60天的是( )。
债务和解是债权人自愿同意减少债务。()
__________为全国诸葛亮后裔的最大聚居地,其最神奇之处,当数称为中国一绝的村落布局。
简述发展心理学的研究领域。
在数据库应用系统运行阶段,数据库日常维护工作主要是由DBA完成的,下列工作中不属于数据库运行维护工作的是(),
Thatwayoflivingis______topeopleinthissmallpartofthecountry.
最新回复
(
0
)