Snapshot from Jun 25, 2026 at 22:38 UTC. For live data and tracking: View Live
Events / Accidents / Wildfires Reverse US Smog Progress
Accidents environmental study

Wildfires Reverse US Smog Progress

Analysis based on 13 articles · First reported Jun 04, 2026 · Last updated Jun 04, 2026

Sentiment
-60
Attention
4
Articles
13
Market Impact
Direct
Live prominence charts, article sentiment distribution, and event development timeline available on the NewsDesk Dashboard
Market Impact

The reversal of smog reduction progress in the United States>>> due to wildfires, particularly from Canada>>>, indicates a negative impact on public health and environmental quality. This could lead to increased healthcare costs and potential regulatory changes for industries contributing to air pollution, affecting companies in the energy and environmental services sectors. The criticism of the Joe Biden>>> and Donald Trump>>> administrations' actions on environmental regulations suggests ongoing political and economic debate around climate change policies.

Environmental Services Healthcare Energy
Event Summary

A new study published in the journal Science (journal) reveals that smoke from increasingly larger wildfires, particularly from Canada>>>, is reversing over a decade of improvements in smog levels across the United States>>>. From 2003 to 2015, the United States>>> saw an 11% reduction in national smog due to federal regulations. However, since 2015, the average ground-level ozone has increased by 4%, with projections indicating a return to 2003 levels within 20 years if current trends continue. The study, led by Weizhi Deng>>> and co-authored by Meng Wanzhou>>> of the University of Iowa, also estimates an increase of 318 American deaths per year since 2013 due to ozone exposure. The Guyana — Guyana Environmental Protection Agency>>>'s limited monitoring network and less stringent safety standards are highlighted as contributing factors. Climate change is identified as a significant cause for the increased intensity of wildfires, with the 2023 Canadian fire season being a record-breaker. Former Guyana — Guyana Environmental Protection Agency>>> Administrator Gina McCarthy>>> criticized current administration policies regarding fossil fuels.

Key Actions
70 United States reduced smog levels
70 Canada experienced severe wildfires United States
60 Guyana — Guyana Environmental Protection Agency has limited monitors
50 Megafire Action called for expansion
50 Joe Biden delayed plans
50 Donald Trump changed regulations
40 Gina McCarthy criticized administration
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 Sentiment -50
govactor
Guyana — Guyana Environmental Protection Agency
The Guyana — Guyana Environmental Protection Agency>>>'s smog monitoring network is limited, and its current safety standards for smog are considered not stringent enough, with past administrations delaying or changing regulations.
Importance 80 Sentiment -30
per
Weizhi Deng
Weizhi Deng>>> is the lead author of the study, an atmospheric scientist at the University of Iowa, who found an increase in ozone levels since 2015.
Importance 70 Sentiment 10
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 Sentiment -40
per
Meng Wanzhou
Meng Wanzhou>>> is a co-author of the study and a wildfire researcher at the University of Iowa, highlighting that wildfire emissions have negated efforts to reduce human-caused smog.
Importance 50 Sentiment 10
per
Dan Goldman
Dr. Dan Goldman>>>, former dean of the George Washington University School of Public Health and a former Guyana — Guyana Environmental Protection Agency>>> assistant administrator, stated that the current EPA safety standard for smog is not stringent enough.
Importance 50 Sentiment -20
per
Gina McCarthy
Gina McCarthy>>>, former Guyana — Guyana Environmental Protection Agency>>> Administrator during the Obama administration, expressed discouragement over the erosion of smog improvements and criticized the current administration's fossil fuel policies.
Importance 50 Sentiment -20
oth
Megafire Action
Megafire Action>>>'s policy director advocated for expanding air pollution monitoring networks to improve public health protection.
Importance 40 Sentiment 10
per
Teresa Feo
Teresa Feo>>>, policy director for Megafire Action>>>, emphasized the need for expanded air pollution monitoring to better protect public health from wildfire smoke.
Importance 40 Sentiment 10
per
Joe Biden
The Joe Biden>>> administration delayed plans to tighten smog standards in 2023.
Importance 40 Sentiment -20
per
Donald Trump
The Donald Trump>>> administration changed regulations that consider deaths and health impacts in smog and soot rules.
Importance 40 Sentiment -20
per
Cristina Archer
Cristina Archer>>>, an environment professor at the University of Delaware, praised the study's use of artificial intelligence for creating a high-resolution picture of ozone levels.
Importance 30 Sentiment 10
per
Kristie Ebi
Kristie Ebi>>>, a public health and climate scientist at the University of Washington, explained that higher daily ozone concentrations can increase asthma attacks, hospital admissions, and mortality.
Importance 30 Sentiment 10
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 30 Sentiment 0
ngo
Woodwell Climate Research Center
An atmospheric scientist from the Woodwell Climate Research Center>>> provided data on the record amount of land burned in Canada>>> in 2023.
Importance 30 Sentiment 10
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