Air Quality

From ground-level ozone to particulate matter to nitrogen dioxide, an array of gasses and particles can affect the air people breathe, with implications for human health.
Hazy Skies in a Growing City
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Hazy Skies in a Growing City

Chiang Mai, a city in northern Thailand popular with tourists, faces seasonal spikes in air pollution.  

Published Apr 8, 2024

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Filling an Air Pollution Data Gap
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Filling an Air Pollution Data Gap

Many cities have shortages of air quality monitors. NASA scientists have developed a tool called GEOS-CF that can help.

Published Nov 30, 2023

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A Hazy November in Northern India
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A Hazy November in Northern India

Even with fewer fires than normal in fall 2023, poor air quality plagued the region.

Published Nov 20, 2023

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A Wall of Dust in the Tarim Basin
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A Wall of Dust in the Tarim Basin

Flanked by mountain ranges on three sides, the basin in northwestern China sees frequent dust storms.

Published Nov 14, 2023

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An Unequal Air Pollution Burden at School
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An Unequal Air Pollution Burden at School

Satellite observations show that students of color in the U.S. attend public schools with higher concentrations of air pollution than their white peers.

Published Nov 1, 2023

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A Smoky May for North America
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A Smoky May for North America

Fierce fires in Canada are the source of smoke that has swirled across much of the continent.

Published May 24, 2023

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How Dust Affects the World’s Health
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How Dust Affects the World’s Health

NASA research finds that a combination of windblown dust and human-caused particle pollution was associated with nearly 3 million premature deaths in 2019.

Published Mar 17, 2023

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Nitrogen Dioxide in the Neighborhood
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Nitrogen Dioxide in the Neighborhood

A team of scientists mapped nitrogen dioxide in California’s air at the neighborhood scale and found hotspots of the air pollutant near high-rise buildings and food processing facilities.

Published Mar 7, 2023

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Dust Blows Across the U.S. Southwest
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Dust Blows Across the U.S. Southwest

In the wake of a cold front, strong winds lofted dust into the air over northern Mexico, eastern New Mexico, and northwestern Texas.

Published Mar 1, 2023

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Snow and Haze in Utah
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Snow and Haze in Utah

Snowy surfaces increase the chance of temperature inversions, which contribute to air quality problems in the Salt Lake City area.

Published Feb 16, 2023

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Sichuan’s Smoggy Basin
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Sichuan’s Smoggy Basin

The waters of an ancient lake once pooled in this basin in southwestern China. Now haze and air pollution do the same.

Published Feb 2, 2023

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Winter Sandstorm in China
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Winter Sandstorm in China

A rare December sandstorm in China darkened skies in several cities.

Published Dec 13, 2022

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Smoky Skies in Northern India
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Smoky Skies in Northern India

Seasonal fires and a mix of other pollutants darkened skies in Delhi and beyond.

Published Nov 3, 2022

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Fuel Regulation Reduced Air Pollution from Shipping
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Fuel Regulation Reduced Air Pollution from Shipping

A global standard limiting sulfur in ship fuel reduced artificial “ship track” clouds to record-low levels in 2020. Pandemic-related disruptions played a secondary role.

Published Oct 19, 2022

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Clearer View of Great Lakes Air Quality
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Clearer View of Great Lakes Air Quality

Scientists and regulators are using satellite data and custom models from NASA to help monitor ozone pollution.

Published Jul 28, 2022

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A Global Decline in Carbon Monoxide
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A Global Decline in Carbon Monoxide

The widespread adoption of cleaner-burning technologies and declines in fire activity over the past two decades has drawn down global levels of the pollutant.

Published May 26, 2022

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No Breathing Easy for City Dwellers: Particulates
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No Breathing Easy for City Dwellers: Particulates

A new satellite-derived dataset links concentrations of fine particulate matter in air pollution with health outcomes in cities around the world.

Published Mar 15, 2022

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No Breathing Easy for City Dwellers: Nitrogen Dioxide
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No Breathing Easy for City Dwellers: Nitrogen Dioxide

A new satellite-derived global dataset links concentrations of nitrogen dioxide with cases of pediatric asthma in urban areas around the world.

Published Mar 14, 2022

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An Extra Air Pollution Burden
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An Extra Air Pollution Burden

New research shows that neighborhoods in Washington, D.C., with more people of color are exposed to more air pollution and have higher rates of disease.

Published Nov 9, 2021

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Scientific Questions Arrive in Ports
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Scientific Questions Arrive in Ports

Satellite observations of nitrogen dioxide near key U.S. ports suggest that increased shipping activity and backlogs may be affecting air quality.

Published Oct 27, 2021

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COVID-19 Lockdowns Cut Pollution, But Not All of It
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COVID-19 Lockdowns Cut Pollution, But Not All of It

Dust storms and other weather phenomena offset some reductions in PM2.5 aerosol pollution.

Published Jun 25, 2021

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Reduced Fires Lead to Some Air Quality Improvements in Africa
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Reduced Fires Lead to Some Air Quality Improvements in Africa

Changes in fire patterns have led to seasonal reductions in nitrogen dioxide pollution.

Published Mar 14, 2021

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Nitrogen Dioxide Levels Rebound in China
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Nitrogen Dioxide Levels Rebound in China

With most lockdowns ending and economic activity resuming, levels of the air pollutant have returned to near normal for this time of year.

Published May 22, 2020

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Airborne Particle Levels Plummet in Northern India
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Airborne Particle Levels Plummet in Northern India

Satellite data show that aerosol levels have dropped significantly since the COVID-19 lockdown began.

Published Apr 20, 2020

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Airborne Nitrogen Dioxide Plummets Over China
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Airborne Nitrogen Dioxide Plummets Over China

NO2 amounts have dropped with the coronavirus quarantine, Chinese New Year, and a related economic slowdown.

Published Feb 28, 2020

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