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Microscopic solid or liquid matter suspended in the Earth's atmosphere
particle diameter of 10 micrometers (μm) or less; fine particles, designated PM2.5, with a diameter of 2.5 μm or less; ultrafine particles, PM.10 with a diameter
Particulate_matter
Parallel computer networking software
Parallel Multithreaded Machine (PM2) is a software for parallel networking of computers. PM2 is an open-source distributed multithreaded programming environment
PM2
Project management methodology
Henny Portman (Jan 29, 2017). "EU Commission released new PM Methodology (PM2) guide". WordPress. Archived from the original on 2017-07-02. Retrieved 2017-07-02
PM²
Node.js process manager
PM2 is a process manager for the JavaScript runtime Node.js. PM2 or Process Manager 2, is an Open Source, production ready Node.js process manager. Some
PM2_(software)
according to their average measured concentration of particulate matter (PM2.5) in micrograms per cubic metre (μg/m3). The World Health Organization's
List of countries by air pollution
List_of_countries_by_air_pollution
Submachine gun
The PM2 (short for Indonesian: "Pistol Mitraliur 2", "Submachine Gun 2") is a submachine gun manufactured by Pindad of Indonesia. This sub-machine gun
Pindad_PM2
Topics referred to by the same term
PM2 may refer to: Parallel Multithreaded Machine, a software for parallel networking of computers PM2 (software), a software for Node.js process management
PM2_(disambiguation)
Presence of dangerous substances in the air
and PM2.5 seem to increase its risk. About 265,000 lung cancer deaths were attributed globally in 2019 to exposure to fine particulate matter (PM2.5) suspended
Air_pollution
American aerospace company
company's Goddard development vehicle. Another early suborbital test vehicle, PM2, had two flight tests in 2011 in west Texas. The vehicle designation may
Blue_Origin
This list contains the most-polluted cities by PM2.5 annual mean concentration measurement as documented by the World Health Organization (WHO) covering
List of most-polluted cities by particulate matter concentration
List_of_most-polluted_cities_by_particulate_matter_concentration
Measure of air pollution
nitrogen dioxide; sulfur dioxide and particulate matter (including PM10 and PM2.5). For any given hour the AQHI is calculated from the sum of the percentage
Air_quality_index
Air pollution event in eastern China
airborne pollutants to form a thick layer of smog over the region. Levels of PM2.5 particulate matter averaged over 150 micrograms per cubic metre; in some
2013_Eastern_China_smog
Warehouse fire in Los Angeles, California
to air quality impacts. Regulatory monitors and sensors recorded improved PM2.5 levels in Central and Southeast Los Angeles, the San Gabriel Valley, and
2026 Boyle Heights warehouse fire
2026_Boyle_Heights_warehouse_fire
Genus of viruses
sharing a name with its family. Prophages closely related to bacteriophage PM2 are abundant in the genomes of aquatic bacteria, suggesting that the ecological
Merivirus
Effects of air pollution on reproduction
London between 2006–2010 examined NOx, NO2, PM2.5 from traffic exhaust, PM2.5 from traffic non-exhaust, PM2.5, PM10, and O3. After adjustment for the effects
Pollution_and_reproduction
Class of 298 German two-cylinder 4-6-2 locomotives
along with ten streamlined 03.10s. The Polish version of the Class 03, the Pm2 (running number 34), can be seen at the railway museum in Warsaw. The locomotives
DRG_Class_03
Adverse environmental contamination
Particulate matter, or fine dust is characterized by their micrometre size PM10 to PM2.5. Chemical pollution: the introduction of novel entities (NEs) in the environment
Pollution
Air pollution event in Thailand
nearby provinces is likewise a contributor. Thailand's national standards for PM2.5 air quality were revised in 2022 and 2023, to adopt the World Health Organization
2025_Bangkok_smog
Country in Southeastern Europe and West Asia
(14 August 2020). "Spatial distribution of health risks associated with PM2.5 in Turkey and Iran using satellite and ground observations". Atmospheric
Turkey
the PM2.5 level was 153 μg/m3. These levels are considered very unhealthy. In Gwalior, the city with the worst air quality in India, the PM10 and PM2.5
Air_pollution_in_Delhi
American environmental index
Quality Index (AQI) for PM (PM10 - particles less than 10 micrometers, or PM2.5 - particles less than 2.5 micrometers). The PM NowCast is computed from
NowCast_(air_quality_index)
study shows that China reduced PM2.5 by 47% between 2005 and 2015. In August 2019, Beijing experienced the lowest PM2.5 on record—a low of 23 micrograms
Pollution_in_China
Quality of air in Utah
highest concern for health are PM2.5 (or amount of fine particulates with diameters of 2.5 μm or less) of and ozone levels. PM2.5 is usually the pollutant
Air_quality_in_Utah
Camera model
The Olympus PEN E-PM2 is a digital rangefinder-style mirrorless interchangeable lens camera in the Micro Four Thirds system. It was announced by Olympus
Olympus_PEN_E-PM2
Country in Central Asia
and the use of low-quality fuel, and in the 2010s, it was the increase in PM2.5 concentrations due to the construction boom and climatic conditions. By
Uzbekistan
Product of incomplete combustion of hydrocarbons
suggest that these correlations be more closely linked with fine particles (PM2.5) and ultra-fine particles (PM0.1). Long-term exposure to urban air pollution
Soot
Below is a list of cities with the annual mean concentration of PM2.5 lower than 10 μg/m3 in 2022. Please note that constraints exist in this type of
List of least-polluted cities by particulate matter concentration
List_of_least-polluted_cities_by_particulate_matter_concentration
Index to describe air quality
particulate matter (PM2.5). In addition to the PSI derived by averaging data collected for the past 24 hours, Singapore also publishes 1-hr PM2.5 concentrations
Pollutant_Standards_Index
Comparison of a wide range of areas
picometre (pm2) 1 pm2 10−20 1 square angstrom (Å2) 10,000 pm2 10−19 100,000 pm2 Area of a lipid bilayer, per molecule 75,000–260,000 pm2 Surface area
Orders_of_magnitude_(area)
Biological material that poses serious risks to the health of living organisms
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Biological_hazard
Chemical herbicide and defoliant
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Agent_Orange
SI-derived unit of area
nanometre nm2 1024 square terametre Tm2 10−24 square picometre pm2 1030 square petametre Pm2 10−30 square femtometre fm2 1036 square exametre Em2 10−36 square
Square_metre
Capital city of China
annual average concentration of major airborne fine particulate matter, or PM2.5, declined to 30 micrograms per cubic meter in 2022, the best air quality
Beijing
Deliberate damage or defacement of an object or structure
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Vandalism
World Health Organization guideline
reduce the health effects of air pollution. The guidelines stipulate that PM2.5 should not exceed 5 μg/m3 annual mean, or 15 μg/m3 24-hour mean; and that
Air_quality_guideline
Site for the disposal of waste materials
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Landfill
Pollution of an environment that consists of particles suspended in some medium
In the United Kingdom domestic combustion is the largest single source of PM2.5 annually. In some towns and cities in New South Wales wood smoke may be
Particulate_pollution
Prefecture-level city in Henan, People's Republic of China
most severe air pollution of all the provinces in China, with an average PM2.5 concentration of 103.3 μg/m3 (micrograms per cubic meter). The report found
Xinxiang
Capital and largest city of South Korea
Organization Global Urban Ambient Air Pollution Database, the annual average PM2.5 concentration in 2014 was 24 micrograms per cubic meter (1.0×10−5 gr/cu ft)
Seoul
Inflammation of the sinus' membranes
While both PM10 (particles less than 10 micrometers) and PM2.5 can affect the respiratory system, PM2.5 particles are more closely associated with rhinosinusitis
Sinusitis
Class of perfluorinated chemical compounds
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
PFAS
Smoke-like, fog-like air pollutions
PM2.5 for ‘moderate air quality during 25 days in December 2020 and 25 days in January 2021, while on some days reaching the average of 200-300 PM2.5
Smog
Gases emitted as a result of fuel reactions in combustion engines
Administration (FHWA) state that in 2002 about 1% of all PM10 and 2% of all PM2.5 emissions came from the exhaust of on-road motor vehicles (mostly from
Exhaust_gas
Chemical element with atomic number 61 (Pm)
octahydrate; they led to the conclusion that the density of Pm2(SO4)3·8H2O is 2.86 g/cm3. The oxalate, Pm2(C2O4)3·10H2O, has the lowest solubility of all lanthanide
Promethium
Megacity and union territory of India
associated with it. In 2020, annual average PM2.5 in the city stood at 107.6 μg/m3, which is almost 21.5 times the WHO's PM2.5 Guideline (5 μg/m3; set in September
Delhi
Dutch paper mill
1912 by Van Gelder & Zonen. The company operates two paper machines PM1 and PM2. PM1 has a capacity of 265,000 tonnes per year and is used for the production
Parenco
Scenario of civilization collapse or human extinction by nuclear weapons
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Nuclear_holocaust
Materials left over from the separation of valuable minerals from ore
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Tailings
United States Navy command for logistics
programs compose Military Sealift Command: Fleet Oiler (PM1), Special Mission (PM2), Strategic Sealift (PM3), Tow, Salvage, Tender, and Hospital Ship (PM4)
Military_Sealift_Command
Suspension of fine solid particles or liquid droplets in a gas
to them as particle matter, while the classification in sizes ranges like PM2.5 or PM10, is useful in the field of atmospheric pollution as these size
Aerosol
Country in Central Africa
stood at 34.2 μg/m3, which is almost 6.8 times the World Health Organization PM2.5 guideline (5 μg/m3: set in September 2021). These pollution levels are
Democratic Republic of the Congo
Democratic_Republic_of_the_Congo
Water that does not flow
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Water_stagnation
City in Rajasthan, India
Hotan, with an annual average PM2.5 concentration of 92.7 μg/m3. In some months, such as April, the monthly average PM2.5 concentration becomes as high
Bhiwadi
Waste treatment process
Detailed measurements of fine particles with sizes below 2.5 micrometres (PM2.5) were performed on three of the incinerators: One incinerator equipped
Incineration
Families of half-frame film cameras and digital compact cameras
as the E-PL3, but with a simplified button layout and ergonomics. The E-PM2 was released in Q2 2013, it had the same differences compared to the E-PL5
Olympus_Pen
Submachine gun
input provided by users, to replace the previous generation PM2 submachine gun. Unlike the PM2, which uses blowback mechanism, PM3 uses a gas operated mechanism
Pindad_PM3
Camera model
E-PL1 E-PL2 E-PL3 E-PL5 E-PL6 E-PL7 E-PL8 E-PL9 E-PL10 Entry-level E-PM1 E-PM2 remote Air OM System SLR style Professional OM-1 R OM-1 II R High-end OM-3
Panasonic_Lumix_DC-GH6
Rain that is unusually acidic
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Acid_rain
Environmental issue in Iran
a wide range of diseases and premature deaths. Fine particulate matter (PM2.5) is particularly harmful, as it can penetrate deep into the lungs and enter
Air_pollution_in_Iran
Waste product of fires
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Ash
Capital and the largest city of Ghana
urban ecosystem. Air pollution varies seasonally, and the average measure PM2.5 average concentration of 49.5 μg/m3. Live monitoring of air pollution is
Accra
Inflammatory disease involving a buildup of lesions in the walls of arteries
suggests that higher long-term PM2.5 concentrations are associated with increased IMT progression and that greater reductions in PM2.5 are related to slower
Atherosclerosis
Air quality within and around buildings and structures
monoxide and very small particulates (fine particulate matter, especially PM2.5 and PM10) which get into the bronchioles and alveoles in the lung. Inhaling
Indoor_air_quality
Process of population movement to cities
(CO), and particulate matter with a diameter of less than 2.5 micrometres (PM2.5), can cause DNA methylation of CpG sites in immune cells, which increases
Urbanization
Chemical element with atomic number 80 (Hg)
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Mercury_(element)
Prefecture-level city in Shaanxi, People's Republic of China
concentrations of particulate matter (PM2.5 and PM10) and gaseous contaminants such as sulfur dioxide (SO2) and NOx gases. Elevated PM2.5 levels are linked to respiratory
Yan'an
includes about 130 ships in eight programs: Fleet Oiler (PM1), Special Mission (PM2), Strategic Sealift (PM3), Tow, Salvage, Tender, and Hospital Ship (PM4)
List of Military Sealift Command ships
List_of_Military_Sealift_Command_ships
Waste products disposed of incorrectly at an inappropriate location
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Litter
Smog wave in China
of fine particulates were measured in the city. In Harbin, the levels of PM2.5 particulate matter rose to 1,000 micrograms per cubic metre, worse than
2013_Northeastern_China_smog
Mirrorless interchangeable-lens camera
E-PL1 E-PL2 E-PL3 E-PL5 E-PL6 E-PL7 E-PL8 E-PL9 E-PL10 Entry-level E-PM1 E-PM2 remote Air OM System SLR style Professional OM-1 R OM-1 II R High-end OM-3
OM_System_OM-3
Group of diseases involving cell growth
5 µm (PM2.5) is a group 1 carcinogen. The concentration of PM2.5 in the air is the most reliable predictor of how carcinogenic the air is. PM2.5 primarily
Cancer
Camera model
E-P1 E-P2 E-P3 E-P5 PEN-F E-P7 E-PL1 E-PL2 E-PL3 E-PL5 E-PL6 E-PL7 E-PL8 E-PL9 E-PL10 E-PM1 E-PM2 Related Olympus Corporation OM Digital Solutions Zuiko
Olympus_Stylus_SH-2
Camera model
model, the Olympus PEN E-PM2 (a simpler version of the PEN E-PL5 and the successor to the E-PM1). The E-PL5, together with the E-PM2, features a touchscreen
Olympus_PEN_E-PL5
Imaginary line which roughly divides Great Britain into lowland and upland regions
2016). "The sensitivities of emissions reductions for the mitigation of UK PM2.5". Atmospheric Chemistry and Physics. 16 (1): 265–276. doi:10.5194/acp-16-265-2016
Tees–Exe_line
Unwanted material discarded by humans
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Garbage
Urban large-scale air purifier
solve the PM2.5 problem. In the case of India, their population is more packed together, so the towers will be more effective in mitigating PM2.5 ... At
Smog_tower
Rugged compact camera released 2023
E-P1 E-P2 E-P3 E-P5 PEN-F E-P7 E-PL1 E-PL2 E-PL3 E-PL5 E-PL6 E-PL7 E-PL8 E-PL9 E-PL10 E-PM1 E-PM2 Related Olympus Corporation OM Digital Solutions Zuiko
OM_System_Tough_TG-7
Most populous city in the United States
(PM2.5) was 7.0 micrograms per cubic meter, or 3.0 micrograms within the recommended limit of the WHO Air Quality Guidelines for the annual mean PM2.5
New_York_City
anemia in children under the age of 5 and PM2.5 levels in air, with every 10 μg per cubic meter increase in PM2.5 levels being linked to a decrease in hemoglobin
Malnutrition_in_India
Result of nuclear radiation exposure
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Acute_radiation_syndrome
Special administrative region of China
suspended particulates (RSP or PM10), fine suspended particulates (FSP or PM2.5), volatile organic compounds (VOC), carbon monoxide (CO), ozone and lead
Hong_Kong
Chemical compound
Promethium(III) oxalate is an oxalate of promethium, with the chemical formula Pm2(C2O4)3. Its decahydrate crystallizes in the monoclinic crystal system with
Promethium(III)_oxalate
Senior non-commissioned officer in many navies and coast guards
chief petty officer 2nd class (CPO2) (premier maître de deuxième classe or pm2 in French) is equivalent to a master warrant officer in the Army and Air
Chief_petty_officer
Steep-sided canyon in Arizona, US
2006. Retrieved April 16, 2012. "US Annual Spatial and Seasonal Patterns of PM2.5, Light Extinction and Contributions of Major Aerosol Types, 1996 – 1998"
Grand_Canyon
Highway in Chicago, Illinois, US
fine particulate matter (PM2.5), a type of air pollution comprising tiny particles that can penetrate deep into the lungs. PM2.5 poses severe health risks
Kennedy_Expressway
Any voluntarily bodily motion that requires energy expenditure
concentrations of fine particulate matter (PM2.5). Specifically, the reduction in mortality risk was approximately 30% at PM2.5 concentrations below 25 μg/m3, compared
Physical_activity
Air pollution in the Republic of China (Taiwan)
PM2.5 particles in Taipei City and New Taipei City is 20 μg/m3, while being 30 μg/m3 in Kaohsiung. Further more, in greater Taipei, the outdoor PM2.5
Air_pollution_in_Taiwan
Air pollution event in Thailand
Chiang Mai municipality declared several areas as disaster zones following PM2.5 levels in some districts exceeding 300 micrograms per cubic meter, almost
2026_Chiang_Mai_Smog
US EPA limits on certain air pollutants
limits are set in the NAAQS are ozone (O3), atmospheric particulate matter (PM2.5/PM10), lead (Pb), carbon monoxide (CO), sulfur oxides (SOx), and nitrogen
National Ambient Air Quality Standards
National_Ambient_Air_Quality_Standards
Capital city of India
the Anand Vihar district with an index of 319.[citation needed] Levels of PM2.5 were recorded at 710 μg/m3, more than 11 times the World Health Organization's
New_Delhi
Poor quality of air in the capital and largest city of Mexico
particles (PM10) can decrease respiratory functionality. Ultrafine Particles (PM2.5), tend to penetrate into the gas exchange regions of the lung (alveolus)
Air_pollution_in_Mexico_City
Flow of excess rainwater not infiltrating in the ground over its surface
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Surface_runoff
Capital of Maharashtra, India
average PM2.5 concentration in 2013 was 63 μg/m3, which was 6.3 times higher than that recommended by the WHO Air Quality Guideline for annual mean PM2.5.
Mumbai
pollution. Fine particulate matter (PM2.5) plays a major role in air pollution in Karachi. The concentration of PM2.5 in the city has been recorded as
Air_pollution_in_Karachi
Air pollution in the Arctic caused by sources further south
Lists Diseases Law by country Most polluted cities Least polluted cities by PM2.5 Treaties Most polluted rivers Categories By country Environment portal
Arctic_haze
Tool that uses an additional power source
contributes to lung cancer incidence in Europe". Worldwide, exposure to PM2.5 contributed to 4.1 million deaths from heart disease, stroke, lung cancer
Power_tool
Camera model
E-P1 E-P2 E-P3 E-P5 PEN-F E-P7 E-PL1 E-PL2 E-PL3 E-PL5 E-PL6 E-PL7 E-PL8 E-PL9 E-PL10 E-PM1 E-PM2 Related Olympus Corporation OM Digital Solutions Zuiko
Olympus_SP-510_Ultra_Zoom
Panasonic GF5 267 g 108 mm 67 mm 37 mm 12 MP No No 2012 Discontinued Olympus E-PM2 269 g 110 mm 64 mm 34 mm 16 MP Yes No 2012 Discontinued Panasonic GF9 / GX800
List of lightest mirrorless cameras
List_of_lightest_mirrorless_cameras
Form of cremation
second study examined the carbonaceous fractions associated with indoor PM2.5/PM10 during Asian cultural and ritual burning practices. (Dewangan, et
Pyre
Camera model
E-P1 E-P2 E-P3 E-P5 PEN-F E-P7 E-PL1 E-PL2 E-PL3 E-PL5 E-PL6 E-PL7 E-PL8 E-PL9 E-PL10 E-PM1 E-PM2 Related Olympus Corporation OM Digital Solutions Zuiko
Olympus_C-150
PM2
PM2
PM2
PM2
Biblical
red; scarlet
Girl/Female
American, Australian, British, English
Wide Meadow; From St Denis
Girl/Female
Tamil
Monashini | மோநாஷீநீ
Excellent
Girl/Female
Hindu
Male
Hebrew
Variant spelling of Hebrew Dathan, DATAN means "belonging to a fountain."
Girl/Female
Hindu, Indian, Traditional
Very Fragnant
Biblical
an orator
Girl/Female
Indian
Sweet Little Lady
Girl/Female
Indian, Tamil
Beautiful
Girl/Female
Indian
Goddess Parvati
PM2
PM2
PM2
PM2
PM2