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
Light pollution is the glow you can see at night above cities and towns. It is a problem that has been accompanying man ever sin
Light pollution is the glow you can see at night above cities and towns. It is a problem that has been accompanying man ever sin
admin
2013-12-21
29
问题
Light pollution is the glow you can see at night above cities and towns. It is a problem that has been accompanying man ever since he started his first fire some 15 000 years ago, and technology has only made it worse. Light pollution is the stray(杂乱的)light that comes from streetlights, billboard signs, buildings, parking lots, sports arenas and any other source of illumination that is reflected or directed into the atmosphere. Light pollution is made worse with air pollution, as the small particles that float in the air serve to scatter and reflect the light, compounding the problem. The effect of light pollution is to-reduce the contrast, and therefore the visibility of dimmer objects in the night sky, which affects professional, as well as amateur astronomers.
Light pollution exists on every continent except Antarctica. Urban light pollution means that one-fifth of the world’s population can no longer see the Milky Way with the naked eye. Many city kids, even if they did peer through the orange smog above their heads, would probably see only a handful of stars. We have lost our view of the stars, and we have mucked up(把......弄脏)our nighttime environment as well.
Lots of people find the ever-brightening night annoying, and animals that are programmed to prefer the dark may avoid brightened habitat. Sea turtles can get lost searching for a beach to lay eggs, and their hatchlings(幼龟)may confuse over-lit beachfront resorts for the ocean horizon, wasting precious energy needed to find the sea and escape predators. Because their necks aren’t yet long enough to see things far away, baby turtles rely on the mirror image of the moon to guide them to the sea, to begin their new life. A car may even hit a particular turtle, which was thinking the light from a nearby city was moonlight reflecting off the ocean waves. Birds that live in and around cities can die because of sky glow, too. The abundance of bright lights can blind them, leading to countless collisions with buildings, billboards and other tall structures.
These are merely a few of the possible negative effects light pollution has on our world. A very serious issue in our modern-day society is that light pollution is a terrible waste of energy since lighting is responsible for one-fourth of all energy consumption worldwide.
Reducing light pollution is not difficult. Light pollution is the easiest type of pollution to end. On an individual level, people can help reduce much sky glow by using lighting only when necessary and by choosing well shielded lighting fixtures. The stars above us are a priceless heritage—not only for astronomers but for all humans. More of our children should be able to look up at night and see that the Milky Way is not just a candy bar.
What is light pollution in modern society?
选项
A、A way of energy waste.
B、A necessity for electricity.
C、A source of greenhouse gas emissions.
D、A threat to nature mother.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/EQ17777K
0
大学英语六级
相关试题推荐
Haveyoueverfeltslightlyundertheweather,calledyourdoctorforadviceandbeenaskedtodragyourselftoheroffice—onl
Whenagamemaster(游戏设计师)commencecreatingandrunningagamingcampaign,shealmostalwaysdrawsinspirationsfrommovies,ficti
RecentlyBroadpointCommunications,afledg-ling(刚起步的)mediacompany,startedhandingoutfreelong-distancetelephonecalls.In
TheLoveofaRobotCancomputerseverreallybelikeus,andifnot,whynot?Thesimilaritiesareobvious.Wecanbothwor
Itisnotsurprisingthataphilosophyborrowedfrombusinessshouldseeitsprincipalfocuswithineducationasthefurthering
Itisnotsurprisingthataphilosophyborrowedfrombusinessshouldseeitsprincipalfocuswithineducationasthefurthering
Markway,now55,isexperiencinganewkindofAmericancareerstage:thenot-quite-retirement.Aslifespanslengthen,pensions
Almosteveryonewithorwithoutacomputerisawareofthelatesttechnologicalrevolutiondestinedtochangeforeverthewayin
A、Thenewmuseum.B、Thenewposter.C、Thehistorydepartment.D、ThespecialtourtoNewYork.B语义理解题。女士很喜欢男士的新海报,并询问男士是否在超市买到的;男
Thetrendtowardsmallerfamiliesmaynotbeasmodernaswethink.Althoughwomengatherershadfourorfivechildren,onlytwo
随机试题
车床精车外圆的圆柱度误差有长度范围规定。()
以下关于软盘格式化叙述中______是不正确的。
过点M0(1,1,1)且以a={4,3,2}为方向向量的直线方程某种扩音器系统的单价P(元)与需求量x(套)之间的函数关系为P=-0.02x+400(0≤x≤20000),则边际收入为________.∫f(x)dx=sin2x+C,C
关于神经的营养性作用,下列叙述正确的是
口腔健康咨询时,一青年认为牙好坏是天生的,刷不刷牙无所谓,口腔科医生告诉他正确的认识应是
对于国务院反垄断委员会的机构定位和工作职责,下列哪一选项是正确的?()
项目部涉及质量验评工作的责任部门包括()。
还本付息通知单应包括的内容有()。
以下嵌入式处理器类型中不具备内存管理单元(MMU)的是(10),嵌入式操作系统(11)可以运行在它上面。(11)
What’sthenewsitemmainlyabout?
最新回复
(
0
)