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References

Sources & further reading.

Every statistic in this project is drawn from the organizations below. All are excellent starting points if you'd like to dig deeper.

  • World Health Organization
    Ambient (outdoor) air pollution fact sheet
  • U.S. Environmental Protection Agency
    AirNow — real-time U.S. AQI
  • U.S. EPA
    Air Quality Trends
  • CDC
    Air Quality & Health
  • NIEHS
    Air Pollution and Your Health
  • State of Global Air
    Annual Global Air Report
  • IQAir
    World Air Quality Report
  • AQLI, University of Chicago
    Air Quality Life Index
  • American Lung Association
    State of the Air

Image credits

Photography

All photographs on this site are used courtesy of their photographers via Unsplash under the Unsplash License.

  • Home hero
    Photo by David Kristianto on Unsplash
  • Pollutants
    Photo by Aung Myat on Unsplash
  • Sources
    Photo by The Transport Enthusiast DC on Unsplash
  • Health
    Photo by Getty Images (Unsplash+) on Unsplash
  • Solutions
    Photo by Alexander Mils (Unsplash+) on Unsplash
  • Conclusion
    Photo by Samuel Quek on Unsplash
Breathe.

An Environmental Health project exploring air quality and public health.

Authors

  • Jackson Jorgensen
  • Ethan Luther

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© 2026 Environmental Health Project. Sources: WHO, EPA, CDC, NIEHS, State of Global Air.