Particulate Matter (PM) Basics | US EPA
2024年6月20日 · 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.
懸浮粒子 - 维基百科，自由的百科全书
懸浮顆粒（particulate matter，PM）又稱细颗粒物 [4] 、颗粒物 [5] 、粒状物，简称颗粒（particulates）或微粒，泛指悬浮在空气中的固体颗粒或液滴，顆粒微小甚至肉眼難以辨識但仍有尺度的差異；一般是指大气中的颗粒，故又称大气颗粒物（atmospheric particulate matter）。
Inhalable Particulate Matter and Health (PM2.5 and PM10)
Particulate matter has been shown in many scientific studies to reduce visibility, and also to adversely affect climate, ecosystems and materials. PM, primarily PM2.5, affects visibility by altering the way light is absorbed and scattered in the atmosphere.
National Ambient Air Quality Standards (NAAQS) for PM
2024年12月19日 · On February 7, 2024, EPA strengthened the National Ambient Air Quality Standards for Particulate Matter (PM NAAQS) to protect millions of Americans from harmful and costly health impacts, such as heart attacks and premature death.
Particulate Matter (PM) Pollution | US EPA - U.S. Environmental ...
2025年1月16日 · Particulate matter (PM) is one of the air pollutants regulated by the National Ambient Air Quality Standards (NAAQS). Reducing emissions of inhalable particles improves public health as well as visibility.
WHO global air quality guidelines: particulate matter (PM2.5 and PM10 …
2021年9月22日 · In 2015, the World Health Assembly adopted a landmark resolution on air quality and health, recognizing air pollution as a risk factor for noncommunicable diseases such as ischaemic heart disease, stroke, chronic obstructive pulmonary disease, asthma and cancer, and the economic toll they take.
Particle Pollution - American Lung Association
2023年10月25日 · Particle pollution, also called “particulate matter” or “soot,” refers to a mix of tiny solid and liquid particles that are in the air we breathe. Ever look at dirty tailpipe exhaust or notice a haze in the air from wildfire smoke? A big part of what you see is particle pollution.
Particulate Matter | Air Quality - NASA
3 天之前 · The majority of deaths are associated with fine particulate matter of less than 2.5 µm in width (PM 2.5).
Particulate Matter: 1. What is Particulate Matter (PM)?
Particulate matter is the sum of all solid and liquid particles suspended in air many of which are hazardous. This complex mixture includes both organic and inorganic particles, such as dust, pollen, soot, smoke, and liquid droplets. These particles vary greatly in …
Sources of particulate-matter air pollution and its oxidative ... - Nature
2020年11月18日 · Poor air quality associated with high levels of particulate matter (PM) is one of the five greatest health risks worldwide, alongside high blood pressure, smoking, diabetes and obesity...
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