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Related Concept Videos

Oxidative Cleavage of Alkenes: Ozonolysis01:46

Oxidative Cleavage of Alkenes: Ozonolysis

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Visualizing Lung Cellular Adaptations during Combined Ozone and LPS Induced Murine Acute Lung Injury
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Published on: March 21, 2021

Ozone from wildfire plumes increases mortality.

Benjamin de Foy1

  • 1Department of Earth, Environmental and Geospatial Science, Saint Louis University, St. Louis, MO, USA.

Science (New York, N.Y.)
|June 4, 2026
PubMed
Summary
This summary is machine-generated.

Wildfire smoke is reversing decades of progress in reducing harmful ground-level ozone pollution across the United States. This trend threatens public health and environmental quality nationwide.

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Area of Science:

  • Environmental Science
  • Atmospheric Chemistry
  • Public Health

Background:

  • Ground-level ozone (O3) is a harmful air pollutant with significant respiratory health impacts.
  • Decades of regulatory efforts in the United States have led to substantial improvements in air quality and reductions in ozone exposure.
  • Wildfires have become a more frequent and intense source of air pollution, including ozone precursors and direct ozone formation.

Purpose of the Study:

  • To assess the impact of increasing wildfire activity on surface ozone levels in the United States.
  • To determine if wildfire-driven ozone increases are negating historical air quality improvements.
  • To evaluate the potential public health and environmental consequences of reversed ozone trends.

Main Methods:

  • Analysis of historical ground-level ozone monitoring data across the US.
  • Utilizing satellite and ground-based data to quantify wildfire smoke plume impacts.
  • Employing atmospheric models to simulate ozone formation and transport influenced by wildfire emissions.
  • Statistical analysis to correlate wildfire events with ozone exceedance days.

Main Results:

  • Significant increases in surface ozone concentrations attributed to wildfire smoke events have been observed.
  • In some regions, wildfire impacts have demonstrably reversed the long-term declining trend of ozone exposure.
  • Wildfire-related ozone pollution is particularly pronounced in the western United States but is increasingly affecting other regions.
  • Exceedances of ozone health-based air quality standards are more frequent during periods of heavy wildfire smoke intrusion.

Conclusions:

  • Wildfires pose a substantial and growing threat to achieving and maintaining healthy air quality standards for surface ozone in the US.
  • The positive trajectory of reducing ozone exposure is at risk, necessitating adaptive management and mitigation strategies for both wildfires and ozone pollution.
  • Future air quality management plans must explicitly incorporate the impact of wildfire emissions to protect public health and the environment.