I*******g
发帖数: 7600 | 1 对身体的伤害是什么？
吸入肺泡后，就积累在身体里吗？ | d****i
发帖数: 2048 | | I****t
发帖数: 4963 | | I*******g
发帖数: 7600 | 4 没有看， 解释一下吧
【在 I****t 的大作中提到】
: 没看柴记者的片子么
| l*******1
发帖数: 16217 | 5 粒径小于等于 2.5 微米的粉尘颗粒，可以越过人类鼻腔，呼吸道滤过系统，直达肺泡 | I*******g
发帖数: 7600 | 6 就积累在肺泡吗？
不能够排出了？
泡
【在 l*******1 的大作中提到】
: 粒径小于等于 2.5 微米的粉尘颗粒，可以越过人类鼻腔，呼吸道滤过系统，直达肺泡
| l*******1
发帖数: 16217 | 7 上课时候说是肺泡细胞内吞，然后代谢出去，不过可能有代谢不聊了的，你看看抽烟人
和下矿井人的肺就知道了，6天雾霾相当于吸一根香烟 | I****t
发帖数: 4963 | 8 找来看看吧
不管准确与否，一开始就详细用动画介绍了PM2.5
【在 I*******g 的大作中提到】
: 没有看， 解释一下吧
| B*****D
发帖数: 12 | 9 楼上的父母都在国内，盼着家里人点儿好比啥不强！整天妈屄的雾霾啊 PM2.5的，你难
道有本事把你父母立马接出来海外定居？
别他妈整天一人吃饱全家不饿，有精神儿了就你妈上网叨逼叨雾霾。。。 | s*********r
发帖数: 2575 | 10 我以前也学过，现在全都还给老师了。
【在 l*******1 的大作中提到】
: 上课时候说是肺泡细胞内吞，然后代谢出去，不过可能有代谢不聊了的，你看看抽烟人
: 和下矿井人的肺就知道了，6天雾霾相当于吸一根香烟
| w*****3
发帖数: 2301 | 11 What is PM, and how does it get into the air?Size comparisons for PM
particles
Size comparisons for PM particles
PM stands for particulate matter (also called particle pollution): the term
for a mixture of solid particles and liquid droplets found in the air. Some
particles, such as dust, dirt, soot, or smoke, are large or dark enough to
be seen with the naked eye. Others are so small they can only be detected
using an electron microscope.
Particle pollution includes:
PM10 : inhalable particles, with diameters that are generally 10 micrometers
and smaller; and
PM2.5 : fine inhalable particles, with diameters that are generally 2.5
micrometers and smaller.
How small is 2.5 micrometers? Think about a single hair from your head. The
average human hair is about 70 micrometers in diameter – making it 30 times
larger than the largest fine particle.
Sources of PM
These particles come in many sizes and shapes and can be made up of hundreds
of different chemicals.
Some are emitted directly from a source, such as construction sites, unpaved
roads, fields, smokestacks or fires.
Most particles form in the atmosphere as a result of complex reactions of
chemicals such as sulfur dioxide and nitrogen oxides, which are pollutants
emitted from power plants, industries and automobiles.
Top of Page
What are the Harmful Effects of PM?
Particulate matter contains microscopic solids or liquid droplets that are
so small that they can be inhaled and cause serious health problems.
Particles less than 10 micrometers in diameter pose the greatest problems,
because they can get deep into your lungs, and some may even get into your
bloodstream.
Fine particles (PM2.5) are the main cause of reduced visibility (haze) in
parts of the United States, including many of our treasured national parks
and wilderness areas.
Learn more about health and environmental effects
Top of Page
What is Being Done to Reduce Particle Pollution?
EPA regulates inhalable particles. Particles of sand and large dust, which
are larger than 10 micrometers, are not regulated by EPA.
EPA’s national and regional rules to reduce emissions of pollutants that
form PM will help state and local governments meet the Agency’s national
air quality standards. Learn about how air quality standards help reduce PM.
How Can I Reduce My Exposure to PM?
You can use air quality alerts to protect yourself and others when PM
reaches harmful levels:
AirNow: Every day the Air Quality Index (AQI) tells you how clean or
polluted your outdoor air is, along with associated health effects that may
be of concern. The AQI translates air quality data into numbers and colors
that help people understand when to take action to protect their health.
Go to About AirNow to learn how you can get AQI notifications.
Also learn how the Air Quality Flag Program can help air agencies, schools,
and other community organizations to notify their citizens of harmful
conditions and adjust outdoor physical activities as needed.
Top of Page
Contact Us to ask a question, provide feedback, or report a problem. | n***y
发帖数: 2730 | 12 我只了解P225，那是个好东东，对身体伤害是致命地。 | y****g
发帖数: 36950 | 13 一天抽10根烟的哭晕在厕所
这辈子的雾霾都吸完了
【在 l*******1 的大作中提到】
: 上课时候说是肺泡细胞内吞，然后代谢出去，不过可能有代谢不聊了的，你看看抽烟人
: 和下矿井人的肺就知道了，6天雾霾相当于吸一根香烟
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