未登录,请登录后再发表信息
最新评论 (0)
播放视频

马路边的空气污染更严重吗?

Why air pollution can be worse across the street

So I’m about to do an air pollution test.
我马上要做一个空气污染测试
I’m here at the I-5 overpass,
这里是I-5号高架桥
and I’m getting small particle count readings of around 240.
空气中细颗粒物指数约为240
I’m one block away from the freeway, in a residential neighborhood,
现在我在一个与高速公路隔着一个街区的住宅区里
and the particle counts are down to around 150,160.
这里的颗粒指数降到了150 160左右
The air we breathe depends on where we are.
我们呼吸的空气取决于我们所处的位置
These spots are only a block apart,
两地只有一个街区之隔
but they have a big difference in air quality.
但空气质量却有很大差别
This is typical in any city:
这在城区是很常见的
air quality can get 10 times worse in as little as a block.
一个街区内的空气质量可达到10倍之差
But the tools we had weren’t designed to capture that level of detail.
但此工具设计之初 并不是为了捕捉如此细微的差异
Until now, cheap, portable air sensors have
到目前为止 便宜 便携的空气传感器
changed the way we see air pollution.
已经改变了我们监测空气污染的方式
They’re starting to open the door to a whole new type of air science.
它们开创了研究空气科学的全新模式
And that’s allowing people to monitor the air at the community level.
那就是让普通人也可以监测社区里的空气质量
But to understand why this matters, let’s start with this:
但是为了理解其中的重要性 让我们从下面说起
This is what a traditional air monitor looks like.
这就是传统的空气监测器
They’ve been the gold standard since the 50s and 60s.
自五六十年代以来 它们一直是模范标准
These monitors suck air through a filter, and then weigh the dirty filter.
这些监测器将空气吸入过滤器 然后称量过滤器增加的重量
They give you a really accurate reading.
这样监测器就能给出精确的空气污染指数
But that accuracy comes with its drawbacks: They’re huge.
虽然结果精确 但也有缺陷——太笨重了
You can’t move them around.
你搬不动这些家伙
And they’re really expensive.
而且它们价格着实不菲
So most cities just have a few monitors, stationed across town.
因此 很多城市只在市区安置几台监测器
You get a really accurate picture of certain areas,
你可以得到某些地区的空气状况详图
but miss a lot of that block-to-block detail.
却无法得到街区间的详细资料
Now if you were to add more sensors,
而现在 在更多传感器的帮助下
you could actually start to see a neighborhood’s air quality.
你可以看到周边地区的空气质量
Or a block’s air quality.
或是一个街区的空气质量
So that’s where these come in!
所以这就是传感器的作用!
These smaller air sensors have come onto the market over the past decade.
这种小型空气传感器在过去十年里已经上市
They shoot a laser through the air,
它们向空气发射激光
and measure the light reflected off the particles.
并测量空气中微粒反射回来的光
It’s a tool that’s small and cheap.
这种工具不仅小巧而且成本低廉
So for the cost of one traditional air monitor,
所以用买一台传统空气监测器的钱
you can get 100 of these new, portable sensors.
你可以买到100个便携式新型传感器
That’s allowing regular people to start collecting data
这使得普通民众也能够加入到
about the air they breathe.
收集空气数据的行列中
I tagged along with a group of teenagers,
我看到过一群青少年
using air sensors that they checked out from a library.
用从图书馆借来的传感器测量空气质量
It’s part of a program from the Puget Sound Clean Air Agency.
这是普吉特湾清洁空气机构项目的一部分
They lend out low-cost air sensors to citizen scientists and community groups.
他们将低成本的空气传感器借给公民科学家和社区组织
And there’s similar programs in LA and Chicago.
在洛杉矶和芝加哥也有类似的项目
We’re able to lend these air sensors to people,
我们把空气传感器借给人们
they’re able to monitor in their communities
让他们可以在自己的社区里监测空气
and then start a dialogue with the people around them.
然后与周围的人交流他们的空气数据
These teenagers are with the Service Board, a youth leadership nonprofit.
这些少年来自服务委员会 一个非盈利的青年领导机构
They’re collecting block-by-block air data in downtown Seattle,
他们在西雅图市中心 挨个街区地去收集空气数据
nearby buses, idling trucks,
在公交车附近 在闲置的卡车旁
even this guy smoking a cigarette.
甚至是在这个抽烟的家伙旁
In the four blocks they sampled,
在抽样调查的四个街区里
they found the air quality varied a lot.
他们发现空气质量有很大差异
You might get minute data for 100 places,
你可能会获得100个位置的分钟数据
whereas normally you would get hour data for 10 places.
但通常你更愿意获得10个位置的逐时数据
You can use that to ask a lot of interesting questions
通过这些数据 你可以提出许多
about what the air quality is across the city.
关于整个城市空气质量的有趣的问题
And that’s just starting to get investigated.
这才只是个开始
Capturing that variation is what the portable air sensors do best.
便携式空气传感器的最大优势就是对细小差异很敏感
And understanding those details can have real impacts.
理解那些细小差异对监测空气质量有着重要的影响
Take Seattle’s South Park Community Center.
以西雅图的南方公园社区中心为例
It’s in an urban neighborhood surrounded by a lot of highway traffic and industry.
它位于一个被许多高速公路和工厂围绕的市区
The quality of air, you can kind of see it.
那里的空气质量如何 可以想象得到
You can taste it, so to speak.
不过还是要拿数据说话
So community members borrowed some air sensors.
因此社区成员借了一些空气传感器
And they found the air quality varied across the property.
他们发现整个小区的空气质量参差不齐
And it was worst at the playground.
并且运动场处的最糟糕
This location of having the freeway so close to the playground.
这里的运动场离高速公路很近
It’s like it will seem like you wouldn’t make a good idea.
这看起来可不是什么好的设计
Now the community center has plans to remodel
现在社区中心打算重新改造
and it’s going to move the playground away from the freeway.
准备把运动场移到远离高速公路的地方
Understanding air pollution on a hyperlocal level
了解局部地区的空气污染状况
can help communities make smarter decisions.
有助于社区做更明智的决策
Still, these portable air sensors have their limits.
不过 这种便携式空气传感器也有其局限性
They just aren’t as accurate as traditionalair monitors.
它们测量结果不如传统监测器精确
Ideally, they compliment each other, like a server vs a phone.
理想情况下 它们优势互补 像服务器和电话那样
Air pollution is a little different from block to block and hour to hour.
空气污染程度会随着地点和时间的变化而有所不同
It’s all the tailpipes, smokestacks, or even smokers around us.
与我们周围排气管 烟囱 乃至吸烟者的有关
Now we have the tools to capture those variations.
现在 我们有去捕捉那些微小差异的工具了
And that means we have the potential
也就是说我们有能力
to see and build our communities in healthier ways.
以更健康的方式去监测并建设我们的社区
So portable air sensors cost 200 to 500 bucks.
便携式空气传感器价格在200到500美元之间
But you can also build your own which I did
但你也可以学学我 自己做一个传感器
and I’ll show you in this video.
想知道我怎么做的吗?
Please click the description to watch it.
请点击说明查看

发表评论

译制信息
视频概述

空气是我们时时刻刻都需要的物质,与我们的健康息息相关,想知道你周围的空气质量如何吗,快来了解一下吧

听录译者

收集自网络

翻译译者

kuki仔

审核员

审核员Y

视频来源

https://www.youtube.com/watch?v=s_Rf7PHjdxI

相关推荐