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Events / US Smog Reverses Due to Wildfires
environmental environmental study

US Smog Reverses Due to Wildfires

Analysis based on 20 articles · First reported Jun 04, 2026 · Last updated Jun 17, 2026

Sentiment
-70
Attention
6
Articles
20
Market Impact
General
Live prominence charts, article sentiment distribution, and event development timeline available on the Ergen Dashboard
Market Impact

The reversal of smog reduction progress in the United States due to wildfires, as detailed in the study published in Science (journal), is expected to negatively impact the healthcare and insurance industries due to increased respiratory illnesses and premature deaths. The actions of Joe Biden and Donald Trump regarding environmental regulations could further exacerbate these issues, leading to higher costs and reduced public health. The increased frequency and intensity of wildfires, particularly from Canada, will likely continue to affect air quality across the United States, potentially impacting tourism and outdoor recreation sectors.

environmental services healthcare insurance
Event Summary

A new study published in the journal Science reveals that the United States' progress in reducing national smog levels has been reversed since 2015 due to increasingly larger wildfires. While the national smog level dropped by 11% from 2003 to 2015 due to federal regulations, it has since increased by 4%. This reversal is attributed to wildfire smoke, which releases precursor chemicals that form ozone. The study, led by Weizhi Deng and Meng Wanzhou of the University of Iowa, estimates an increase of 318 American deaths per year since 2013 from ozone-related lung issues. The research utilized AI to create a high-resolution dataset of ozone levels, compensating for the limited coverage of Guyana — Guyana Environmental Protection Agency (EPA) monitors. Experts like Cristina Archer and Kristie Ebi confirm the study's methodology and the health impacts of ozone. The study also highlights that 43 million people in the United States were exposed to smog levels exceeding EPA safety standards during the 2022-2024 wildfire seasons, with significant smoke originating from Canada's record wildfire seasons. Former EPA administrators Dan Goldman and Gina McCarthy criticized the current administration's policies, including Joe Biden's delay in tightening smog standards and Donald Trump's changes to regulations concerning health impacts.

Entities Involved
cnt
United States
The national smog levels in the United States>>> have increased due to wildfire smoke, reversing over a decade of improvements in air quality and leading to increased deaths.
Importance 100.0 Sentiment -50.0
cnt
Canada
Wildfires in Canada>>> have been particularly severe since 2022, with smoke traveling south to the United States>>> and contributing significantly to increased smog and particle pollution deaths.
Importance 70.0 Sentiment -40.0
govactor
Guyana — Guyana Environmental Protection Agency
The Guyana — Guyana Environmental Protection Agency's (EPA) smog monitors have limited coverage, which the new study addressed using AI. The EPA's safety standards for smog are also considered not stringent enough.
Importance 60.0 Sentiment -20.0
per
Weizhi Deng
Weizhi Deng is the lead author of the study, an atmospheric scientist at the University of Iowa, who highlighted the increase in ozone levels since 2015 due to wildfires.
Importance 50.0 Sentiment 10.0
oth
Megafire Action
Megafire Action>>>'s policy director advocated for expanding air pollution monitoring networks to improve public health protection.
Importance 40.0 Sentiment 10.0
per
Donald Trump
The Donald Trump>>> administration changed regulations that consider deaths and health impacts in smog and soot rules.
Importance 40.0 Sentiment -20.0
per
Meng Wanzhou
Meng Wanzhou is a co-author of the study and a wildfire researcher at the University of Iowa, emphasizing that wildfire impacts have negated efforts to reduce human-caused smog.
Importance 30.0 Sentiment 10.0
per
Dan Goldman
Dr. Dan Goldman, former dean of the George Washington University School of Public Health and former EPA assistant administrator, stated that the current EPA safety standard for smog is not stringent enough.
Importance 20.0 Sentiment -10.0
per
Gina McCarthy
Gina McCarthy, former EPA Administrator, expressed discouragement over the erosion of smog improvements and criticized the current administration's fossil fuel policies.
Importance 20.0 Sentiment -10.0
per
Barack Obama
Barack Obama>>>'s administration saw Gina McCarthy>>> serve as Guyana — Guyana Environmental Protection Agency>>> Administrator.
Importance 20.0 Sentiment 0.0
per
Joe Biden
The Biden administration delayed plans to tighten smog standards in 2023, which is seen as contributing to the ongoing air quality issues.
Importance 20.0 Sentiment -20.0
per
Cristina Archer
Cristina Archer, an environment professor at the University of Delaware, validated the study's AI method as solid and exceptional.
Importance 10.0 Sentiment 5.0
per
Teresa Feo
Teresa Feo, research director and senior policy advisor for Megafire Action, advocated for expanding air pollution monitoring.
Importance 10.0 Sentiment 5.0
per
Kristie Ebi
Kristie Ebi, a public health and climate scientist at the University of Washington, explained that higher daily ozone concentrations increase asthma attacks, hospital admissions, and mortality.
Importance 10.0 Sentiment 5.0
govactor
United States — National Interagency Fire Center
The United States — National Interagency Fire Center reported that the average amount of U.S. land burned by wildfires each year is 9% higher than from 2003 to 2014.
Importance 10.0 Sentiment 0.0
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Relationships
United States strained-ally ↔ Canada The United States has severely strained its historically close relationship with Canada by imposing sweeping tariffs and
United States related ↔ Guyana — Guyana Environmental Protection Agency
United States related ↔ Donald Trump
United States related ↔ Meng Wanzhou
United States related ↔ Barack Obama
Canada related ↔ Guyana — Guyana Environmental Protection Agency
Canada related ↔ Donald Trump
Canada related ↔ Meng Wanzhou
Guyana — Guyana Environmental Protection Agency related ↔ Donald Trump
Donald Trump related ↔ Barack Obama
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