How people get it: Exposure depends on where you live and work. Indoor air can be ventilated or filtered.
The basics
What it is
- Car emissions, factory chemicals, dust, pollen and mold spores may be suspended in the air as particles.
- Ozone, a gas, is a major part of city air pollution.
- Ozone that forms air pollution is also called smog.
- Air pollution is not only outside. Indoor air can also be polluted and affect health.
How people are exposed, and how it may affect health
Some air pollutants are poisonous, and breathing them in can raise the chance of health problems.
What the research has found so far
- Studies have linked breathing PM2.5, a fine particle pollutant, to a higher risk of death.
- In a study covering 21 years, deaths fell after air pollution rules began and coal-powered plants were retired.
- A large study of over 57,000 women found living near major roads may raise breast cancer risk.
- Researchers found 10 years of exposure to PM2.5 and NO2 raised the risks of colorectal and prostate cancers in older adults.
- Researchers linked short-term daily exposure to nitrogen oxides with a higher risk of one type of stroke in post-menopausal women.
- A study of over 300,000 women found long-term exposure, especially to ozone and PM2.5, raises the risk of postpartum depression.
- Researchers found that exposure to high levels of wildfire particles during pregnancy was linked to a greater chance of preterm birth.
- A study found that improved air quality was linked to lower dementia risk in older women.
Source: National Institute of Environmental Health Sciences (NIH): Air Pollution and Your Health ↗
On air pollution and aging, PubMed lists 171 trials in people, 3,967 studies that watched people over time, 140 animal and lab studies. See the counts and searches
Stage 2 because 171 published trials and 257 registered trials in people have been found, but no large ones yet.
A stage shows how far research has got, not whether it will work for you. How stages work
Who may be more affected
- People with heart or lung disease, older adults and children are at greater risk from air pollution.
- Air pollution can make breathing harder for people with asthma and other breathing diseases.
- Children and teens may be more sensitive than adults to the health effects of air pollution, especially children with asthma.
- Particle pollution has been linked to heart attacks and strokes, and even death in people with heart disease.
Sources: MedlinePlus (NIH): Air Pollution: MedlinePlus ↗ · CDC: About Air Quality | Air Quality ↗
Approval and legal status
The Air Quality Index covers major U.S. air pollutants regulated by the Environmental Protection Agency, including ozone and particle pollution.
Questions to ask your doctor
- Is my exposure to air pollution something to think about, given my health?
- Is there a test that measures it, and would it tell us anything useful?
- Which ways of lowering exposure are worth the effort, and which aren't?
- Is anything in my home, work or diet likely to be a big source?
This is general information gathered from the sources listed, not medical advice. Talk to your doctor before starting anything new.
Tools that can lower exposure
Read from each maker's page. The research stage is for the exposure, not for any one product; check a product's certification for what it removes.
What experts say
No expert views collected yet. Each one we add names the person and links to where they said it.
What others are writing
Recent articles about Air pollution from health journalists, hospitals and universities. We link to them; we don't write or endorse them.
Air pollution is still a problem for nearly half of Americans, report finds ↗
“Air in the U.S. has gotten cleaner for decades, adding years to people's lives and preventing millions of asthma attacks, but nearly half of Americans still live with unhealthy air pollution, a new report finds.”
Air pollution remains unhealthy for nearly half of Americans despite decades of cleaner air, according to a new report.
The dangers of air pollution for heart health ↗
“Air pollution has been linked with a long list of serious health outcomes. In slide presentations, Francine Laden uses a graphic illustration that shows the wide range of damage that has been linked to pollutants.”
Harvard Chan experts explain how air pollution harms the heart, which components are most dangerous, and how people can protect themselves.
Unveiling the health consequences of air pollution in the world’s most polluted nations ↗
“Air pollution poses a persuasive threat to global health, demonstrating widespread detrimental effects on populations worldwide. Exposure to pollutants, notably particulate matter with a diameter of 2.5 µm (PM 2.5 ), has been unequivocally linked to a spectrum of adverse health outcomes.”
The study finds PM2.5 air pollution is linked to lower life expectancy and higher infant mortality across the world's most polluted nations.
Recent research
Air pollution and faster heart aging: a new way to test the idea
The authors propose a framework to tell apart pollution harm to the heart from faster heart aging.
How common lung disease COPD is among adults in Taif, Saudi Arabia
This study looks at how many adults in one city already have COPD, a long-term lung disease.
Trials
ClinicalTrials.gov lists 257 registered trials that mention Air pollution, for any condition (the count in The science below). Here we show the ones about aging. See them all ↗
The science
Counted from PubMed and ClinicalTrials.gov on Oct 30, 2026, using one search for Air pollution in relation to aging. Each link opens the exact search.
- Randomized trials in people
- 115 search ↗
- Large trials (multicenter or phase 3)
- 11 search ↗
- Phase 3 trials
- 0 search ↗
- Trials in people
- 171 search ↗
- Studies that watched people over time
- 3,967 search ↗
- Animal and lab studies
- 140 search ↗
- Registered trials
- 257 search ↗
PubMed search used
("air pollution"[tiab] OR "particulate matter"[tiab] OR "PM2.5"[tiab] OR "indoor air"[tiab] OR "Air Pollution"[mh]) AND (aging[tiab] OR ageing[tiab] OR longevity[tiab] OR healthspan[tiab] OR "older adults"[tiab] OR "older people"[tiab] OR elderly[tiab] OR "Aged"[mh])
Counts are search results, so they include some records that only mention Air pollution. How we count
Cite or share this page
Longevity Progress. (n.d.). Air pollution (outdoor and indoor): Research stage and evidence. Retrieved October 30, 2026, from https://longevityprogress.com/treatments/air-pollution
<iframe src="https://longevityprogress.com/embed/stage/air-pollution" title="Air pollution (outdoor and indoor): research stage on Longevity Progress" width="340" height="72" style="border:0" loading="lazy"></iframe>
The badge shows this treatment's current research stage and links back here. It updates by itself when the stage changes.